./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:16:06,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:16:06,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:16:06,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:16:06,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:16:06,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:16:06,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:16:06,767 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:16:06,768 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:16:06,772 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:16:06,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:16:06,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:16:06,774 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:16:06,775 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:16:06,775 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:16:06,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:16:06,776 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:16:06,776 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:16:06,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:16:06,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:16:06,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:16:06,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:16:06,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:16:06,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:16:06,778 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:16:06,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:16:06,779 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:16:06,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:16:06,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:16:06,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:16:06,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:16:06,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:16:06,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:16:06,781 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:16:06,781 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:16:06,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:16:06,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:16:06,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:16:06,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:16:06,782 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:16:06,782 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:16:06,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:16:06,782 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:16:06,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:16:07,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:16:07,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:16:07,004 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:16:07,005 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:16:07,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 21:16:08,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:16:08,228 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:16:08,229 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 21:16:08,235 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c18279d9/878e0b953ae5441688ae04d99713e9bc/FLAGe51c99c40 [2023-11-22 21:16:08,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c18279d9/878e0b953ae5441688ae04d99713e9bc [2023-11-22 21:16:08,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:16:08,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:16:08,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:16:08,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:16:08,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:16:08,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb90c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08, skipping insertion in model container [2023-11-22 21:16:08,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,287 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:16:08,434 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 21:16:08,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:16:08,461 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:16:08,482 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 21:16:08,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:16:08,506 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:16:08,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08 WrapperNode [2023-11-22 21:16:08,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:16:08,508 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:16:08,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:16:08,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:16:08,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,528 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,553 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2023-11-22 21:16:08,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:16:08,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:16:08,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:16:08,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:16:08,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:16:08,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:16:08,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:16:08,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:16:08,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (1/1) ... [2023-11-22 21:16:08,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:16:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:08,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:16:08,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:16:08,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:16:08,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-22 21:16:08,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-22 21:16:08,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-22 21:16:08,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-22 21:16:08,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:16:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:16:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:16:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 21:16:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:16:08,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:16:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:16:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:16:08,718 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 21:16:08,816 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:16:08,817 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:16:09,063 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:16:09,258 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:16:09,258 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-22 21:16:09,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:16:09 BoogieIcfgContainer [2023-11-22 21:16:09,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:16:09,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:16:09,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:16:09,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:16:09,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:16:08" (1/3) ... [2023-11-22 21:16:09,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f13152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:16:09, skipping insertion in model container [2023-11-22 21:16:09,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:16:08" (2/3) ... [2023-11-22 21:16:09,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f13152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:16:09, skipping insertion in model container [2023-11-22 21:16:09,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:16:09" (3/3) ... [2023-11-22 21:16:09,268 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-11-22 21:16:09,275 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-22 21:16:09,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:16:09,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:16:09,284 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 21:16:09,329 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-22 21:16:09,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 21:16:09,388 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-22 21:16:09,388 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 21:16:09,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-22 21:16:09,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 21:16:09,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2023-11-22 21:16:09,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:16:09,416 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@74569488, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:16:09,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-22 21:16:09,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 21:16:09,427 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-22 21:16:09,428 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 21:16:09,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:09,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:09,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:09,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -28525233, now seen corresponding path program 1 times [2023-11-22 21:16:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:09,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475855389] [2023-11-22 21:16:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475855389] [2023-11-22 21:16:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475855389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:16:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822149680] [2023-11-22 21:16:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:09,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:16:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:16:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:16:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:09,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:09,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:09,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:09,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:10,004 INFO L124 PetriNetUnfolderBase]: 219/344 cut-off events. [2023-11-22 21:16:10,004 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-22 21:16:10,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 344 events. 219/344 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1216 event pairs, 45 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 596. Up to 221 conditions per place. [2023-11-22 21:16:10,010 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-11-22 21:16:10,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2023-11-22 21:16:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:16:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 21:16:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-22 21:16:10,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-22 21:16:10,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-22 21:16:10,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-22 21:16:10,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:10,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-22 21:16:10,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,031 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2023-11-22 21:16:10,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2023-11-22 21:16:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 21:16:10,036 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 75 flow [2023-11-22 21:16:10,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-22 21:16:10,042 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-22 21:16:10,042 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 75 flow [2023-11-22 21:16:10,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:10,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:10,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:16:10,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:10,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash 135500589, now seen corresponding path program 1 times [2023-11-22 21:16:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915912397] [2023-11-22 21:16:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:10,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:10,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915912397] [2023-11-22 21:16:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915912397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:16:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489710011] [2023-11-22 21:16:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:16:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:16:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 21:16:10,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:10,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:10,269 INFO L124 PetriNetUnfolderBase]: 314/520 cut-off events. [2023-11-22 21:16:10,269 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-22 21:16:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 520 events. 314/520 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2111 event pairs, 184 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 424. Up to 340 conditions per place. [2023-11-22 21:16:10,272 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-22 21:16:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 224 flow [2023-11-22 21:16:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:16:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 21:16:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-22 21:16:10,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-22 21:16:10,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-22 21:16:10,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-22 21:16:10,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:10,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-22 21:16:10,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,276 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,276 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 75 flow. Second operand 5 states and 70 transitions. [2023-11-22 21:16:10,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 224 flow [2023-11-22 21:16:10,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 21:16:10,278 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 108 flow [2023-11-22 21:16:10,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-22 21:16:10,278 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-22 21:16:10,279 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 108 flow [2023-11-22 21:16:10,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:10,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 21:16:10,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:10,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -891589587, now seen corresponding path program 1 times [2023-11-22 21:16:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975500438] [2023-11-22 21:16:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975500438] [2023-11-22 21:16:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975500438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:16:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074424046] [2023-11-22 21:16:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:16:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:16:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 21:16:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:10,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:10,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:10,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:10,522 INFO L124 PetriNetUnfolderBase]: 245/408 cut-off events. [2023-11-22 21:16:10,522 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-22 21:16:10,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 408 events. 245/408 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1573 event pairs, 139 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 769. Up to 340 conditions per place. [2023-11-22 21:16:10,527 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-22 21:16:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 226 flow [2023-11-22 21:16:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:16:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 21:16:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 21:16:10,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 21:16:10,531 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:10,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,535 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 108 flow. Second operand 5 states and 66 transitions. [2023-11-22 21:16:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 226 flow [2023-11-22 21:16:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-22 21:16:10,539 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 92 flow [2023-11-22 21:16:10,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-22 21:16:10,541 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-11-22 21:16:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 92 flow [2023-11-22 21:16:10,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:10,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 21:16:10,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -582652510, now seen corresponding path program 1 times [2023-11-22 21:16:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767181266] [2023-11-22 21:16:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767181266] [2023-11-22 21:16:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767181266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 21:16:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782098191] [2023-11-22 21:16:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:16:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:16:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:16:10,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:10,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:10,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:10,755 INFO L124 PetriNetUnfolderBase]: 312/517 cut-off events. [2023-11-22 21:16:10,756 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-22 21:16:10,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 517 events. 312/517 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2121 event pairs, 184 based on Foata normal form. 18/526 useless extension candidates. Maximal degree in co-relation 1180. Up to 340 conditions per place. [2023-11-22 21:16:10,758 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-22 21:16:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 232 flow [2023-11-22 21:16:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:16:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 21:16:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 21:16:10,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 21:16:10,761 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:10,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 21:16:10,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,765 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 92 flow. Second operand 5 states and 66 transitions. [2023-11-22 21:16:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 232 flow [2023-11-22 21:16:10,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 214 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:10,769 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 102 flow [2023-11-22 21:16:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-22 21:16:10,771 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-11-22 21:16:10,771 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 102 flow [2023-11-22 21:16:10,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:10,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:10,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 21:16:10,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:10,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash -700286942, now seen corresponding path program 1 times [2023-11-22 21:16:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:10,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755578355] [2023-11-22 21:16:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:10,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:10,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755578355] [2023-11-22 21:16:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755578355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:10,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:10,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 21:16:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173932018] [2023-11-22 21:16:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:16:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:16:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:16:10,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:10,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:10,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:10,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:10,953 INFO L124 PetriNetUnfolderBase]: 291/486 cut-off events. [2023-11-22 21:16:10,953 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-22 21:16:10,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 486 events. 291/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1968 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1072. Up to 254 conditions per place. [2023-11-22 21:16:10,955 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 5 changer transitions 12/57 dead transitions. [2023-11-22 21:16:10,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 276 flow [2023-11-22 21:16:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:16:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 21:16:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2023-11-22 21:16:10,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2023-11-22 21:16:10,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2023-11-22 21:16:10,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2023-11-22 21:16:10,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:10,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2023-11-22 21:16:10,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,964 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,964 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 102 flow. Second operand 5 states and 77 transitions. [2023-11-22 21:16:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 276 flow [2023-11-22 21:16:10,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-22 21:16:10,967 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 113 flow [2023-11-22 21:16:10,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-22 21:16:10,969 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-11-22 21:16:10,969 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 113 flow [2023-11-22 21:16:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:10,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:10,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:10,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 21:16:10,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1671653826, now seen corresponding path program 1 times [2023-11-22 21:16:10,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:10,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375072067] [2023-11-22 21:16:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:11,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375072067] [2023-11-22 21:16:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375072067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263674642] [2023-11-22 21:16:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:11,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:11,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:11,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:16:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:11,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 21:16:11,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:11,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:16:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263674642] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:11,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:16:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2023-11-22 21:16:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356530662] [2023-11-22 21:16:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:11,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 21:16:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 21:16:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:16:11,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:11,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:11,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:11,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:11,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:11,544 INFO L124 PetriNetUnfolderBase]: 277/464 cut-off events. [2023-11-22 21:16:11,544 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-22 21:16:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 464 events. 277/464 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1786 event pairs, 99 based on Foata normal form. 15/473 useless extension candidates. Maximal degree in co-relation 1120. Up to 231 conditions per place. [2023-11-22 21:16:11,547 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-22 21:16:11,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 283 flow [2023-11-22 21:16:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 21:16:11,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 21:16:11,548 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 21:16:11,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 21:16:11,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:11,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 21:16:11,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:11,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:11,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:11,550 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 113 flow. Second operand 7 states and 86 transitions. [2023-11-22 21:16:11,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 283 flow [2023-11-22 21:16:11,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-22 21:16:11,551 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 134 flow [2023-11-22 21:16:11,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-22 21:16:11,552 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2023-11-22 21:16:11,552 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 134 flow [2023-11-22 21:16:11,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:11,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:11,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:11,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:11,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 21:16:11,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:11,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash 441212046, now seen corresponding path program 1 times [2023-11-22 21:16:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483675574] [2023-11-22 21:16:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:11,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:11,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483675574] [2023-11-22 21:16:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483675574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114781858] [2023-11-22 21:16:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:11,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:11,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:11,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:16:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:11,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 21:16:11,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:12,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114781858] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:16:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-22 21:16:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946665198] [2023-11-22 21:16:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:12,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 21:16:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 21:16:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-22 21:16:12,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:12,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:12,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:12,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:12,225 INFO L124 PetriNetUnfolderBase]: 383/696 cut-off events. [2023-11-22 21:16:12,226 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-11-22 21:16:12,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 696 events. 383/696 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3153 event pairs, 153 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1726. Up to 243 conditions per place. [2023-11-22 21:16:12,230 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-22 21:16:12,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 368 flow [2023-11-22 21:16:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-22 21:16:12,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-22 21:16:12,232 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-22 21:16:12,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-22 21:16:12,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:12,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-22 21:16:12,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,233 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,233 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 134 flow. Second operand 7 states and 90 transitions. [2023-11-22 21:16:12,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 368 flow [2023-11-22 21:16:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-22 21:16:12,236 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 152 flow [2023-11-22 21:16:12,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-22 21:16:12,237 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-22 21:16:12,238 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 152 flow [2023-11-22 21:16:12,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:12,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:12,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:12,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-22 21:16:12,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:12,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash 272603849, now seen corresponding path program 1 times [2023-11-22 21:16:12,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090685689] [2023-11-22 21:16:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:12,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:12,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090685689] [2023-11-22 21:16:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090685689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:12,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053671951] [2023-11-22 21:16:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:12,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:12,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:12,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:12,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:12,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:13,170 INFO L124 PetriNetUnfolderBase]: 396/717 cut-off events. [2023-11-22 21:16:13,170 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2023-11-22 21:16:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 717 events. 396/717 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3201 event pairs, 117 based on Foata normal form. 6/720 useless extension candidates. Maximal degree in co-relation 1882. Up to 589 conditions per place. [2023-11-22 21:16:13,174 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 41 selfloop transitions, 12 changer transitions 7/63 dead transitions. [2023-11-22 21:16:13,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 359 flow [2023-11-22 21:16:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:16:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 21:16:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2023-11-22 21:16:13,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2023-11-22 21:16:13,175 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 95 transitions. [2023-11-22 21:16:13,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 95 transitions. [2023-11-22 21:16:13,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:13,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 95 transitions. [2023-11-22 21:16:13,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,176 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,176 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 152 flow. Second operand 8 states and 95 transitions. [2023-11-22 21:16:13,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 359 flow [2023-11-22 21:16:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 21:16:13,178 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 232 flow [2023-11-22 21:16:13,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-22 21:16:13,179 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2023-11-22 21:16:13,179 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 232 flow [2023-11-22 21:16:13,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:13,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:13,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 21:16:13,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:13,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -119994201, now seen corresponding path program 2 times [2023-11-22 21:16:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:13,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738954407] [2023-11-22 21:16:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:13,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738954407] [2023-11-22 21:16:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738954407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:13,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 21:16:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336289527] [2023-11-22 21:16:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 21:16:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 21:16:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:16:13,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:13,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 232 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:13,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:13,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:13,789 INFO L124 PetriNetUnfolderBase]: 394/714 cut-off events. [2023-11-22 21:16:13,789 INFO L125 PetriNetUnfolderBase]: For 760/760 co-relation queries the response was YES. [2023-11-22 21:16:13,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 714 events. 394/714 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3222 event pairs, 87 based on Foata normal form. 6/719 useless extension candidates. Maximal degree in co-relation 2194. Up to 589 conditions per place. [2023-11-22 21:16:13,793 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 10 changer transitions 11/68 dead transitions. [2023-11-22 21:16:13,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 455 flow [2023-11-22 21:16:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2023-11-22 21:16:13,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-11-22 21:16:13,794 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 92 transitions. [2023-11-22 21:16:13,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 92 transitions. [2023-11-22 21:16:13,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:13,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 92 transitions. [2023-11-22 21:16:13,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,796 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 232 flow. Second operand 7 states and 92 transitions. [2023-11-22 21:16:13,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 455 flow [2023-11-22 21:16:13,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 423 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:13,799 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 245 flow [2023-11-22 21:16:13,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-22 21:16:13,800 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-11-22 21:16:13,800 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 245 flow [2023-11-22 21:16:13,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:13,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:13,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:13,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 21:16:13,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:13,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash 159985065, now seen corresponding path program 3 times [2023-11-22 21:16:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:13,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458166200] [2023-11-22 21:16:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458166200] [2023-11-22 21:16:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458166200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:14,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:14,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823027187] [2023-11-22 21:16:14,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:14,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:14,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:14,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:14,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:14,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:14,246 INFO L124 PetriNetUnfolderBase]: 376/691 cut-off events. [2023-11-22 21:16:14,246 INFO L125 PetriNetUnfolderBase]: For 843/852 co-relation queries the response was YES. [2023-11-22 21:16:14,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 691 events. 376/691 cut-off events. For 843/852 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3029 event pairs, 153 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2120. Up to 583 conditions per place. [2023-11-22 21:16:14,251 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 14 changer transitions 11/62 dead transitions. [2023-11-22 21:16:14,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 437 flow [2023-11-22 21:16:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 21:16:14,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 21:16:14,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 21:16:14,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 21:16:14,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:14,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 21:16:14,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,253 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,253 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 245 flow. Second operand 7 states and 86 transitions. [2023-11-22 21:16:14,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 437 flow [2023-11-22 21:16:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 405 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:14,257 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 286 flow [2023-11-22 21:16:14,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-22 21:16:14,257 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-22 21:16:14,257 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 286 flow [2023-11-22 21:16:14,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:14,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:14,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 21:16:14,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:14,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1308181757, now seen corresponding path program 1 times [2023-11-22 21:16:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:14,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870526225] [2023-11-22 21:16:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:14,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:14,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870526225] [2023-11-22 21:16:14,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870526225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:14,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:14,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:14,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349103428] [2023-11-22 21:16:14,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:14,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:14,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:14,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:14,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:14,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:14,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:14,672 INFO L124 PetriNetUnfolderBase]: 352/642 cut-off events. [2023-11-22 21:16:14,672 INFO L125 PetriNetUnfolderBase]: For 843/849 co-relation queries the response was YES. [2023-11-22 21:16:14,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 642 events. 352/642 cut-off events. For 843/849 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2698 event pairs, 159 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2024. Up to 583 conditions per place. [2023-11-22 21:16:14,675 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 13 changer transitions 4/55 dead transitions. [2023-11-22 21:16:14,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 427 flow [2023-11-22 21:16:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-22 21:16:14,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2023-11-22 21:16:14,677 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-22 21:16:14,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-22 21:16:14,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:14,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-22 21:16:14,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,678 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,678 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 286 flow. Second operand 7 states and 76 transitions. [2023-11-22 21:16:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 427 flow [2023-11-22 21:16:14,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 415 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-22 21:16:14,681 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 309 flow [2023-11-22 21:16:14,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-11-22 21:16:14,681 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2023-11-22 21:16:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 309 flow [2023-11-22 21:16:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:14,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:14,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 21:16:14,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:14,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 814749745, now seen corresponding path program 2 times [2023-11-22 21:16:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:14,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889877439] [2023-11-22 21:16:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:14,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889877439] [2023-11-22 21:16:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889877439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134992925] [2023-11-22 21:16:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:16:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:15,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:15,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:16:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:15,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 21:16:15,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:15,264 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:16:15,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-22 21:16:15,333 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:16:15,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 21:16:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:15,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:15,461 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-22 21:16:15,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 131 [2023-11-22 21:16:15,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:15,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2023-11-22 21:16:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:15,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134992925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:15,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-22 21:16:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916426886] [2023-11-22 21:16:15,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:15,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:16:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:16:15,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=394, Unknown=1, NotChecked=0, Total=462 [2023-11-22 21:16:15,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:15,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 309 flow. Second operand has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:15,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:15,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:15,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:17,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 21:16:18,193 INFO L124 PetriNetUnfolderBase]: 570/1033 cut-off events. [2023-11-22 21:16:18,193 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2023-11-22 21:16:18,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1033 events. 570/1033 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5128 event pairs, 86 based on Foata normal form. 24/1056 useless extension candidates. Maximal degree in co-relation 3267. Up to 630 conditions per place. [2023-11-22 21:16:18,199 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 83 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2023-11-22 21:16:18,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 769 flow [2023-11-22 21:16:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:16:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-22 21:16:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2023-11-22 21:16:18,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962382445141066 [2023-11-22 21:16:18,200 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 153 transitions. [2023-11-22 21:16:18,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 153 transitions. [2023-11-22 21:16:18,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:18,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 153 transitions. [2023-11-22 21:16:18,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:18,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:18,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:18,202 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 309 flow. Second operand 11 states and 153 transitions. [2023-11-22 21:16:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 769 flow [2023-11-22 21:16:18,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 738 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:18,206 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 442 flow [2023-11-22 21:16:18,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=442, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-11-22 21:16:18,207 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2023-11-22 21:16:18,207 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 442 flow [2023-11-22 21:16:18,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:18,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:18,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:18,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:18,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:18,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:18,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 698164213, now seen corresponding path program 3 times [2023-11-22 21:16:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003933652] [2023-11-22 21:16:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003933652] [2023-11-22 21:16:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003933652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155201733] [2023-11-22 21:16:18,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:16:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:18,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:16:18,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 21:16:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:18,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 21:16:18,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:18,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:18,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:16:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:18,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:18,984 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:16:18,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:16:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155201733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:19,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2023-11-22 21:16:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105177045] [2023-11-22 21:16:19,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:16:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:16:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:16:19,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:19,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 442 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:19,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:19,420 INFO L124 PetriNetUnfolderBase]: 720/1328 cut-off events. [2023-11-22 21:16:19,420 INFO L125 PetriNetUnfolderBase]: For 3724/3724 co-relation queries the response was YES. [2023-11-22 21:16:19,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 1328 events. 720/1328 cut-off events. For 3724/3724 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7136 event pairs, 200 based on Foata normal form. 24/1350 useless extension candidates. Maximal degree in co-relation 4915. Up to 1030 conditions per place. [2023-11-22 21:16:19,429 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 84 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2023-11-22 21:16:19,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 981 flow [2023-11-22 21:16:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 21:16:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 21:16:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2023-11-22 21:16:19,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2023-11-22 21:16:19,430 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 153 transitions. [2023-11-22 21:16:19,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 153 transitions. [2023-11-22 21:16:19,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:19,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 153 transitions. [2023-11-22 21:16:19,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,432 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,432 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 442 flow. Second operand 12 states and 153 transitions. [2023-11-22 21:16:19,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 981 flow [2023-11-22 21:16:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 932 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-22 21:16:19,441 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 684 flow [2023-11-22 21:16:19,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=684, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2023-11-22 21:16:19,441 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 53 predicate places. [2023-11-22 21:16:19,441 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 684 flow [2023-11-22 21:16:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:19,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:19,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:19,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:19,654 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:19,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1966259215, now seen corresponding path program 4 times [2023-11-22 21:16:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:19,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766641138] [2023-11-22 21:16:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:19,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766641138] [2023-11-22 21:16:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766641138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650270010] [2023-11-22 21:16:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:19,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:19,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 684 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:19,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:19,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:19,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:20,118 INFO L124 PetriNetUnfolderBase]: 738/1353 cut-off events. [2023-11-22 21:16:20,118 INFO L125 PetriNetUnfolderBase]: For 4656/4656 co-relation queries the response was YES. [2023-11-22 21:16:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5362 conditions, 1353 events. 738/1353 cut-off events. For 4656/4656 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7247 event pairs, 321 based on Foata normal form. 12/1363 useless extension candidates. Maximal degree in co-relation 5317. Up to 1263 conditions per place. [2023-11-22 21:16:20,127 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 64 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2023-11-22 21:16:20,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 910 flow [2023-11-22 21:16:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2023-11-22 21:16:20,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-22 21:16:20,128 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 87 transitions. [2023-11-22 21:16:20,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 87 transitions. [2023-11-22 21:16:20,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:20,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 87 transitions. [2023-11-22 21:16:20,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,130 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,130 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 684 flow. Second operand 7 states and 87 transitions. [2023-11-22 21:16:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 910 flow [2023-11-22 21:16:20,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 902 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-22 21:16:20,143 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 730 flow [2023-11-22 21:16:20,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-11-22 21:16:20,143 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2023-11-22 21:16:20,144 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 730 flow [2023-11-22 21:16:20,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:20,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:20,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-22 21:16:20,144 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:20,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash 595539543, now seen corresponding path program 4 times [2023-11-22 21:16:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205768145] [2023-11-22 21:16:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205768145] [2023-11-22 21:16:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205768145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465528026] [2023-11-22 21:16:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:20,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:20,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:20,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 730 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:20,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:20,577 INFO L124 PetriNetUnfolderBase]: 692/1250 cut-off events. [2023-11-22 21:16:20,578 INFO L125 PetriNetUnfolderBase]: For 4935/4935 co-relation queries the response was YES. [2023-11-22 21:16:20,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5182 conditions, 1250 events. 692/1250 cut-off events. For 4935/4935 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6402 event pairs, 299 based on Foata normal form. 4/1252 useless extension candidates. Maximal degree in co-relation 5136. Up to 1183 conditions per place. [2023-11-22 21:16:20,586 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 59 selfloop transitions, 17 changer transitions 3/82 dead transitions. [2023-11-22 21:16:20,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 889 flow [2023-11-22 21:16:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-22 21:16:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2023-11-22 21:16:20,587 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-22 21:16:20,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-22 21:16:20,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:20,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-22 21:16:20,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,588 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,588 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 730 flow. Second operand 7 states and 82 transitions. [2023-11-22 21:16:20,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 889 flow [2023-11-22 21:16:20,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 82 transitions, 853 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:20,600 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 696 flow [2023-11-22 21:16:20,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2023-11-22 21:16:20,601 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2023-11-22 21:16:20,601 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 696 flow [2023-11-22 21:16:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:20,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:20,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:20,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 21:16:20,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1647872323, now seen corresponding path program 5 times [2023-11-22 21:16:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:20,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803817873] [2023-11-22 21:16:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:20,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803817873] [2023-11-22 21:16:20,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803817873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:20,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463043515] [2023-11-22 21:16:20,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:16:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:20,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:20,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:16:20,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:20,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 21:16:20,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:20,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:20,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 21:16:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:20,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:21,042 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:16:21,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:16:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463043515] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:21,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:16:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 14 [2023-11-22 21:16:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059756274] [2023-11-22 21:16:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:21,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 21:16:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 21:16:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:16:21,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:21,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 696 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:21,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:21,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:21,262 INFO L124 PetriNetUnfolderBase]: 732/1341 cut-off events. [2023-11-22 21:16:21,262 INFO L125 PetriNetUnfolderBase]: For 5429/5444 co-relation queries the response was YES. [2023-11-22 21:16:21,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1341 events. 732/1341 cut-off events. For 5429/5444 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7137 event pairs, 273 based on Foata normal form. 34/1372 useless extension candidates. Maximal degree in co-relation 5405. Up to 1142 conditions per place. [2023-11-22 21:16:21,271 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 70 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2023-11-22 21:16:21,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 956 flow [2023-11-22 21:16:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:16:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 21:16:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2023-11-22 21:16:21,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2023-11-22 21:16:21,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 83 transitions. [2023-11-22 21:16:21,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 83 transitions. [2023-11-22 21:16:21,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:21,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 83 transitions. [2023-11-22 21:16:21,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,274 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,275 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 696 flow. Second operand 6 states and 83 transitions. [2023-11-22 21:16:21,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 956 flow [2023-11-22 21:16:21,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 922 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:21,290 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 719 flow [2023-11-22 21:16:21,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-11-22 21:16:21,290 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2023-11-22 21:16:21,290 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 719 flow [2023-11-22 21:16:21,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:21,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:21,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 21:16:21,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:21,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1977138065, now seen corresponding path program 5 times [2023-11-22 21:16:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:21,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769935090] [2023-11-22 21:16:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769935090] [2023-11-22 21:16:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769935090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994007408] [2023-11-22 21:16:21,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:16:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:21,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:21,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:16:21,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:21,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:21,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 21:16:21,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:21,860 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 21:16:21,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 21:16:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:21,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:21,938 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:16:21,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:16:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994007408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:21,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:21,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-22 21:16:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255878849] [2023-11-22 21:16:21,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:16:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:16:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:16:21,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:21,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 719 flow. Second operand has 14 states, 14 states have (on average 8.285714285714286) internal successors, (116), 14 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:21,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:21,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:21,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:22,294 INFO L124 PetriNetUnfolderBase]: 750/1371 cut-off events. [2023-11-22 21:16:22,294 INFO L125 PetriNetUnfolderBase]: For 5908/5923 co-relation queries the response was YES. [2023-11-22 21:16:22,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1371 events. 750/1371 cut-off events. For 5908/5923 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7298 event pairs, 289 based on Foata normal form. 22/1390 useless extension candidates. Maximal degree in co-relation 5675. Up to 1127 conditions per place. [2023-11-22 21:16:22,309 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 70 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2023-11-22 21:16:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 1016 flow [2023-11-22 21:16:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:16:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 21:16:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2023-11-22 21:16:22,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 21:16:22,310 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 98 transitions. [2023-11-22 21:16:22,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 98 transitions. [2023-11-22 21:16:22,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:22,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 98 transitions. [2023-11-22 21:16:22,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,311 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,311 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 719 flow. Second operand 8 states and 98 transitions. [2023-11-22 21:16:22,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 1016 flow [2023-11-22 21:16:22,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 996 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-22 21:16:22,324 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 759 flow [2023-11-22 21:16:22,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=759, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-11-22 21:16:22,325 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 64 predicate places. [2023-11-22 21:16:22,325 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 759 flow [2023-11-22 21:16:22,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.285714285714286) internal successors, (116), 14 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:22,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:22,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:22,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 21:16:22,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:22,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1083634203, now seen corresponding path program 6 times [2023-11-22 21:16:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:22,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523961102] [2023-11-22 21:16:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:22,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:22,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523961102] [2023-11-22 21:16:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523961102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:22,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116951796] [2023-11-22 21:16:22,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:22,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:22,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:22,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:22,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 759 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:22,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:22,970 INFO L124 PetriNetUnfolderBase]: 704/1268 cut-off events. [2023-11-22 21:16:22,970 INFO L125 PetriNetUnfolderBase]: For 6164/6179 co-relation queries the response was YES. [2023-11-22 21:16:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5491 conditions, 1268 events. 704/1268 cut-off events. For 6164/6179 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6527 event pairs, 275 based on Foata normal form. 14/1279 useless extension candidates. Maximal degree in co-relation 5442. Up to 1207 conditions per place. [2023-11-22 21:16:22,978 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 57 selfloop transitions, 17 changer transitions 3/80 dead transitions. [2023-11-22 21:16:22,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 905 flow [2023-11-22 21:16:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2023-11-22 21:16:22,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-22 21:16:22,979 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 77 transitions. [2023-11-22 21:16:22,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 77 transitions. [2023-11-22 21:16:22,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:22,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 77 transitions. [2023-11-22 21:16:22,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,981 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,981 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 759 flow. Second operand 7 states and 77 transitions. [2023-11-22 21:16:22,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 905 flow [2023-11-22 21:16:22,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 80 transitions, 829 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-22 21:16:22,994 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 689 flow [2023-11-22 21:16:22,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=689, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-11-22 21:16:22,995 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2023-11-22 21:16:22,995 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 689 flow [2023-11-22 21:16:22,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:22,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:22,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:22,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-22 21:16:22,995 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:22,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -795919207, now seen corresponding path program 6 times [2023-11-22 21:16:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:22,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138765903] [2023-11-22 21:16:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138765903] [2023-11-22 21:16:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138765903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:23,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:23,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 21:16:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721584473] [2023-11-22 21:16:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:23,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:16:23,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:23,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 689 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:23,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:23,386 INFO L124 PetriNetUnfolderBase]: 720/1292 cut-off events. [2023-11-22 21:16:23,386 INFO L125 PetriNetUnfolderBase]: For 5601/5616 co-relation queries the response was YES. [2023-11-22 21:16:23,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 1292 events. 720/1292 cut-off events. For 5601/5616 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6640 event pairs, 297 based on Foata normal form. 22/1311 useless extension candidates. Maximal degree in co-relation 5418. Up to 1217 conditions per place. [2023-11-22 21:16:23,393 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 63 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2023-11-22 21:16:23,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 907 flow [2023-11-22 21:16:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2023-11-22 21:16:23,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2023-11-22 21:16:23,395 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 81 transitions. [2023-11-22 21:16:23,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 81 transitions. [2023-11-22 21:16:23,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:23,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 81 transitions. [2023-11-22 21:16:23,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:23,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:23,398 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:23,398 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 689 flow. Second operand 7 states and 81 transitions. [2023-11-22 21:16:23,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 907 flow [2023-11-22 21:16:23,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 863 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-22 21:16:23,411 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 696 flow [2023-11-22 21:16:23,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-11-22 21:16:23,412 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2023-11-22 21:16:23,412 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 696 flow [2023-11-22 21:16:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:23,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:23,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:23,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-22 21:16:23,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1815646467, now seen corresponding path program 7 times [2023-11-22 21:16:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:23,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280272770] [2023-11-22 21:16:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:23,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:23,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280272770] [2023-11-22 21:16:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280272770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604727853] [2023-11-22 21:16:23,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:16:23,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:23,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:23,726 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:23,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 21:16:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:23,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 21:16:23,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:23,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:23,926 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:16:23,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-22 21:16:23,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:23,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 21:16:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:24,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:24,129 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-22 21:16:24,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 131 [2023-11-22 21:16:24,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:24,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2023-11-22 21:16:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604727853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:24,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-22 21:16:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264441745] [2023-11-22 21:16:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:16:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:16:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=398, Unknown=1, NotChecked=0, Total=462 [2023-11-22 21:16:24,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:24,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 696 flow. Second operand has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:24,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:25,004 INFO L124 PetriNetUnfolderBase]: 696/1268 cut-off events. [2023-11-22 21:16:25,004 INFO L125 PetriNetUnfolderBase]: For 5290/5290 co-relation queries the response was YES. [2023-11-22 21:16:25,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 1268 events. 696/1268 cut-off events. For 5290/5290 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6578 event pairs, 133 based on Foata normal form. 24/1291 useless extension candidates. Maximal degree in co-relation 5281. Up to 891 conditions per place. [2023-11-22 21:16:25,010 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 86 selfloop transitions, 40 changer transitions 0/129 dead transitions. [2023-11-22 21:16:25,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1149 flow [2023-11-22 21:16:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:16:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-22 21:16:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2023-11-22 21:16:25,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610837438423643 [2023-11-22 21:16:25,011 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 173 transitions. [2023-11-22 21:16:25,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 173 transitions. [2023-11-22 21:16:25,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:25,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 173 transitions. [2023-11-22 21:16:25,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:25,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:25,013 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:25,013 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 696 flow. Second operand 14 states and 173 transitions. [2023-11-22 21:16:25,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1149 flow [2023-11-22 21:16:25,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1113 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:25,029 INFO L231 Difference]: Finished difference. Result has 100 places, 78 transitions, 818 flow [2023-11-22 21:16:25,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=818, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2023-11-22 21:16:25,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 73 predicate places. [2023-11-22 21:16:25,030 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 818 flow [2023-11-22 21:16:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:25,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:25,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:25,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:25,243 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:25,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1820254109, now seen corresponding path program 8 times [2023-11-22 21:16:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:25,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538778843] [2023-11-22 21:16:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538778843] [2023-11-22 21:16:25,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538778843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557147176] [2023-11-22 21:16:25,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:16:25,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:25,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:25,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 21:16:25,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:25,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-22 21:16:25,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:25,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 21:16:25,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 21:16:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:16:25,927 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:16:25,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-22 21:16:25,965 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:16:25,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 21:16:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:25,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:26,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:26,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2023-11-22 21:16:26,231 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-22 21:16:26,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 924 treesize of output 825 [2023-11-22 21:16:26,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:26,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 254 [2023-11-22 21:16:26,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:26,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 316 treesize of output 308 [2023-11-22 21:16:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:27,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557147176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:27,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:27,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-22 21:16:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641725921] [2023-11-22 21:16:27,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:27,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 21:16:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 21:16:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=465, Unknown=4, NotChecked=0, Total=552 [2023-11-22 21:16:27,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:27,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 818 flow. Second operand has 24 states, 24 states have (on average 7.208333333333333) internal successors, (173), 24 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:27,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:27,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:27,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:27,703 INFO L124 PetriNetUnfolderBase]: 630/1144 cut-off events. [2023-11-22 21:16:27,703 INFO L125 PetriNetUnfolderBase]: For 6250/6250 co-relation queries the response was YES. [2023-11-22 21:16:27,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5159 conditions, 1144 events. 630/1144 cut-off events. For 6250/6250 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5815 event pairs, 62 based on Foata normal form. 24/1167 useless extension candidates. Maximal degree in co-relation 5107. Up to 611 conditions per place. [2023-11-22 21:16:27,710 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 33 changer transitions 0/100 dead transitions. [2023-11-22 21:16:27,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 100 transitions, 1085 flow [2023-11-22 21:16:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 21:16:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-22 21:16:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2023-11-22 21:16:27,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2023-11-22 21:16:27,711 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 107 transitions. [2023-11-22 21:16:27,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 107 transitions. [2023-11-22 21:16:27,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:27,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 107 transitions. [2023-11-22 21:16:27,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:27,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:27,716 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:27,716 INFO L175 Difference]: Start difference. First operand has 100 places, 78 transitions, 818 flow. Second operand 9 states and 107 transitions. [2023-11-22 21:16:27,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 100 transitions, 1085 flow [2023-11-22 21:16:27,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 100 transitions, 994 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-11-22 21:16:27,734 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 777 flow [2023-11-22 21:16:27,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2023-11-22 21:16:27,735 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 71 predicate places. [2023-11-22 21:16:27,735 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 777 flow [2023-11-22 21:16:27,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.208333333333333) internal successors, (173), 24 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:27,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:27,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:27,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:27,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-22 21:16:27,950 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:27,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash -578818499, now seen corresponding path program 9 times [2023-11-22 21:16:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:27,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039298338] [2023-11-22 21:16:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:28,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:28,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039298338] [2023-11-22 21:16:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039298338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:28,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:28,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 21:16:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821510526] [2023-11-22 21:16:28,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 21:16:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 21:16:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:16:28,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:28,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 777 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:28,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:28,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:28,491 INFO L124 PetriNetUnfolderBase]: 584/1041 cut-off events. [2023-11-22 21:16:28,491 INFO L125 PetriNetUnfolderBase]: For 5659/5659 co-relation queries the response was YES. [2023-11-22 21:16:28,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 1041 events. 584/1041 cut-off events. For 5659/5659 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5087 event pairs, 186 based on Foata normal form. 4/1044 useless extension candidates. Maximal degree in co-relation 4810. Up to 993 conditions per place. [2023-11-22 21:16:28,497 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 61 selfloop transitions, 15 changer transitions 3/82 dead transitions. [2023-11-22 21:16:28,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 935 flow [2023-11-22 21:16:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2023-11-22 21:16:28,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-22 21:16:28,499 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 77 transitions. [2023-11-22 21:16:28,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 77 transitions. [2023-11-22 21:16:28,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:28,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 77 transitions. [2023-11-22 21:16:28,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,500 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,500 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 777 flow. Second operand 7 states and 77 transitions. [2023-11-22 21:16:28,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 935 flow [2023-11-22 21:16:28,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 845 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-22 21:16:28,515 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 691 flow [2023-11-22 21:16:28,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2023-11-22 21:16:28,516 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2023-11-22 21:16:28,516 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 691 flow [2023-11-22 21:16:28,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:28,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-22 21:16:28,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1683078093, now seen corresponding path program 7 times [2023-11-22 21:16:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238016035] [2023-11-22 21:16:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:28,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238016035] [2023-11-22 21:16:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238016035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:28,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:16:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 21:16:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900810070] [2023-11-22 21:16:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:28,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 21:16:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 21:16:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:16:28,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:28,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 691 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:28,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:28,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:28,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:29,017 INFO L124 PetriNetUnfolderBase]: 534/945 cut-off events. [2023-11-22 21:16:29,017 INFO L125 PetriNetUnfolderBase]: For 3539/3539 co-relation queries the response was YES. [2023-11-22 21:16:29,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4255 conditions, 945 events. 534/945 cut-off events. For 3539/3539 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4474 event pairs, 156 based on Foata normal form. 12/956 useless extension candidates. Maximal degree in co-relation 4207. Up to 865 conditions per place. [2023-11-22 21:16:29,022 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 65 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2023-11-22 21:16:29,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 85 transitions, 901 flow [2023-11-22 21:16:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2023-11-22 21:16:29,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2023-11-22 21:16:29,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 81 transitions. [2023-11-22 21:16:29,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 81 transitions. [2023-11-22 21:16:29,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:29,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 81 transitions. [2023-11-22 21:16:29,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,027 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,027 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 691 flow. Second operand 7 states and 81 transitions. [2023-11-22 21:16:29,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 85 transitions, 901 flow [2023-11-22 21:16:29,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 85 transitions, 868 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-22 21:16:29,037 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 698 flow [2023-11-22 21:16:29,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=698, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-11-22 21:16:29,037 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 66 predicate places. [2023-11-22 21:16:29,037 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 698 flow [2023-11-22 21:16:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:29,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:29,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-22 21:16:29,038 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:29,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1097212646, now seen corresponding path program 1 times [2023-11-22 21:16:29,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650548462] [2023-11-22 21:16:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650548462] [2023-11-22 21:16:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650548462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875484122] [2023-11-22 21:16:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:29,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:29,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:29,110 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:29,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 21:16:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:29,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 21:16:29,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:29,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:29,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875484122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:29,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:29,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 21:16:29,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719576629] [2023-11-22 21:16:29,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:29,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:16:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:16:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:16:29,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:29,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:29,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:29,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:29,474 INFO L124 PetriNetUnfolderBase]: 1016/1801 cut-off events. [2023-11-22 21:16:29,475 INFO L125 PetriNetUnfolderBase]: For 6879/6894 co-relation queries the response was YES. [2023-11-22 21:16:29,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7499 conditions, 1801 events. 1016/1801 cut-off events. For 6879/6894 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9741 event pairs, 144 based on Foata normal form. 18/1816 useless extension candidates. Maximal degree in co-relation 7451. Up to 758 conditions per place. [2023-11-22 21:16:29,485 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 102 selfloop transitions, 28 changer transitions 2/135 dead transitions. [2023-11-22 21:16:29,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 1328 flow [2023-11-22 21:16:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2023-11-22 21:16:29,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2023-11-22 21:16:29,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2023-11-22 21:16:29,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2023-11-22 21:16:29,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:29,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2023-11-22 21:16:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,488 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 698 flow. Second operand 7 states and 122 transitions. [2023-11-22 21:16:29,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 1328 flow [2023-11-22 21:16:29,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1286 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-22 21:16:29,502 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 874 flow [2023-11-22 21:16:29,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2023-11-22 21:16:29,502 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 70 predicate places. [2023-11-22 21:16:29,502 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 874 flow [2023-11-22 21:16:29,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:29,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:29,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:29,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 21:16:29,714 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:29,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1671472810, now seen corresponding path program 2 times [2023-11-22 21:16:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:29,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606500514] [2023-11-22 21:16:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606500514] [2023-11-22 21:16:29,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606500514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080112890] [2023-11-22 21:16:29,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:16:29,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:29,767 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:29,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 21:16:29,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:29,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:29,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 21:16:29,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:29,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 21:16:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080112890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:29,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:29,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 21:16:29,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390507713] [2023-11-22 21:16:29,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:29,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:16:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:16:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:16:29,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:29,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:29,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:29,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:29,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:30,265 INFO L124 PetriNetUnfolderBase]: 1502/2655 cut-off events. [2023-11-22 21:16:30,265 INFO L125 PetriNetUnfolderBase]: For 10417/10432 co-relation queries the response was YES. [2023-11-22 21:16:30,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10982 conditions, 2655 events. 1502/2655 cut-off events. For 10417/10432 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15390 event pairs, 434 based on Foata normal form. 18/2670 useless extension candidates. Maximal degree in co-relation 10931. Up to 1798 conditions per place. [2023-11-22 21:16:30,280 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 116 selfloop transitions, 21 changer transitions 2/142 dead transitions. [2023-11-22 21:16:30,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1483 flow [2023-11-22 21:16:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:16:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 21:16:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2023-11-22 21:16:30,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2023-11-22 21:16:30,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 118 transitions. [2023-11-22 21:16:30,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 118 transitions. [2023-11-22 21:16:30,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:30,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 118 transitions. [2023-11-22 21:16:30,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:30,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:30,283 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:30,283 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 874 flow. Second operand 7 states and 118 transitions. [2023-11-22 21:16:30,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1483 flow [2023-11-22 21:16:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1449 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-22 21:16:30,305 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 1011 flow [2023-11-22 21:16:30,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2023-11-22 21:16:30,306 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2023-11-22 21:16:30,306 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 1011 flow [2023-11-22 21:16:30,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:30,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:30,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:30,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 21:16:30,518 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1385076304, now seen corresponding path program 3 times [2023-11-22 21:16:30,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:30,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468270810] [2023-11-22 21:16:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:30,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:30,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:30,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468270810] [2023-11-22 21:16:30,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468270810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:30,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351585404] [2023-11-22 21:16:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:16:30,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:30,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:30,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:30,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 21:16:30,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:16:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:30,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:16:30,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:30,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:30,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351585404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:30,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:30,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-22 21:16:30,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366970086] [2023-11-22 21:16:30,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:30,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:16:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:16:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:16:30,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:30,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 1011 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:30,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:30,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:30,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:31,435 INFO L124 PetriNetUnfolderBase]: 3039/5510 cut-off events. [2023-11-22 21:16:31,435 INFO L125 PetriNetUnfolderBase]: For 24298/24313 co-relation queries the response was YES. [2023-11-22 21:16:31,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23453 conditions, 5510 events. 3039/5510 cut-off events. For 24298/24313 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38050 event pairs, 1752 based on Foata normal form. 220/5727 useless extension candidates. Maximal degree in co-relation 22783. Up to 2635 conditions per place. [2023-11-22 21:16:31,469 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 232 selfloop transitions, 51 changer transitions 0/286 dead transitions. [2023-11-22 21:16:31,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 286 transitions, 3523 flow [2023-11-22 21:16:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 21:16:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 21:16:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2023-11-22 21:16:31,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-22 21:16:31,470 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 192 transitions. [2023-11-22 21:16:31,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 192 transitions. [2023-11-22 21:16:31,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:31,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 192 transitions. [2023-11-22 21:16:31,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.0) internal successors, (192), 16 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:31,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:31,472 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:31,472 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 1011 flow. Second operand 16 states and 192 transitions. [2023-11-22 21:16:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 286 transitions, 3523 flow [2023-11-22 21:16:31,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 286 transitions, 3390 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-11-22 21:16:31,533 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 1819 flow [2023-11-22 21:16:31,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1819, PETRI_PLACES=125, PETRI_TRANSITIONS=144} [2023-11-22 21:16:31,534 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2023-11-22 21:16:31,534 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 1819 flow [2023-11-22 21:16:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:31,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:31,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:31,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 21:16:31,744 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:31,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1864015222, now seen corresponding path program 4 times [2023-11-22 21:16:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530299237] [2023-11-22 21:16:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:31,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530299237] [2023-11-22 21:16:31,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530299237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:31,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163740074] [2023-11-22 21:16:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:16:31,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:31,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:31,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 21:16:31,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:16:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:31,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 21:16:31,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 21:16:32,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:16:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163740074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:16:32,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:16:32,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-22 21:16:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745679307] [2023-11-22 21:16:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:16:32,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:16:32,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:16:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-22 21:16:32,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:32,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 144 transitions, 1819 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:32,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:32,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:32,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:32,782 INFO L124 PetriNetUnfolderBase]: 3699/6873 cut-off events. [2023-11-22 21:16:32,783 INFO L125 PetriNetUnfolderBase]: For 30519/30519 co-relation queries the response was YES. [2023-11-22 21:16:32,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28450 conditions, 6873 events. 3699/6873 cut-off events. For 30519/30519 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 51115 event pairs, 349 based on Foata normal form. 8/6877 useless extension candidates. Maximal degree in co-relation 27761. Up to 2132 conditions per place. [2023-11-22 21:16:32,815 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 131 selfloop transitions, 96 changer transitions 7/237 dead transitions. [2023-11-22 21:16:32,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 237 transitions, 3002 flow [2023-11-22 21:16:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 21:16:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 21:16:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-22 21:16:32,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44482758620689655 [2023-11-22 21:16:32,825 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-22 21:16:32,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-22 21:16:32,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:32,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-22 21:16:32,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:32,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:32,826 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:32,826 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 1819 flow. Second operand 10 states and 129 transitions. [2023-11-22 21:16:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 237 transitions, 3002 flow [2023-11-22 21:16:32,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 237 transitions, 2977 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-22 21:16:32,895 INFO L231 Difference]: Finished difference. Result has 135 places, 163 transitions, 2249 flow [2023-11-22 21:16:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2249, PETRI_PLACES=135, PETRI_TRANSITIONS=163} [2023-11-22 21:16:32,895 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 108 predicate places. [2023-11-22 21:16:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 163 transitions, 2249 flow [2023-11-22 21:16:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:32,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:33,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-22 21:16:33,101 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:33,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash 749904658, now seen corresponding path program 5 times [2023-11-22 21:16:33,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:33,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506765243] [2023-11-22 21:16:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:33,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:33,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506765243] [2023-11-22 21:16:33,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506765243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076214334] [2023-11-22 21:16:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:16:33,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:33,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:33,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 21:16:33,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 21:16:33,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:33,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:16:33,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:33,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 21:16:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076214334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:33,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-22 21:16:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222712044] [2023-11-22 21:16:33,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:16:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:16:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:16:33,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:33,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 163 transitions, 2249 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:33,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:33,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:33,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:34,155 INFO L124 PetriNetUnfolderBase]: 2304/4293 cut-off events. [2023-11-22 21:16:34,155 INFO L125 PetriNetUnfolderBase]: For 26391/26403 co-relation queries the response was YES. [2023-11-22 21:16:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20992 conditions, 4293 events. 2304/4293 cut-off events. For 26391/26403 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28477 event pairs, 917 based on Foata normal form. 99/4388 useless extension candidates. Maximal degree in co-relation 20821. Up to 2453 conditions per place. [2023-11-22 21:16:34,181 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 92 selfloop transitions, 31 changer transitions 163/289 dead transitions. [2023-11-22 21:16:34,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 289 transitions, 4036 flow [2023-11-22 21:16:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 21:16:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 21:16:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 188 transitions. [2023-11-22 21:16:34,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432183908045977 [2023-11-22 21:16:34,182 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 188 transitions. [2023-11-22 21:16:34,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 188 transitions. [2023-11-22 21:16:34,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:34,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 188 transitions. [2023-11-22 21:16:34,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.533333333333333) internal successors, (188), 15 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:34,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:34,183 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:34,183 INFO L175 Difference]: Start difference. First operand has 135 places, 163 transitions, 2249 flow. Second operand 15 states and 188 transitions. [2023-11-22 21:16:34,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 289 transitions, 4036 flow [2023-11-22 21:16:34,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 289 transitions, 3754 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-11-22 21:16:34,251 INFO L231 Difference]: Finished difference. Result has 144 places, 118 transitions, 1408 flow [2023-11-22 21:16:34,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1408, PETRI_PLACES=144, PETRI_TRANSITIONS=118} [2023-11-22 21:16:34,252 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 117 predicate places. [2023-11-22 21:16:34,252 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 1408 flow [2023-11-22 21:16:34,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:34,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:34,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 21:16:34,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:34,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash 740582363, now seen corresponding path program 6 times [2023-11-22 21:16:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:34,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492769226] [2023-11-22 21:16:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492769226] [2023-11-22 21:16:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492769226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298414257] [2023-11-22 21:16:34,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:16:34,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:34,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:34,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:34,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 21:16:34,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-22 21:16:34,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:34,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 21:16:34,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:34,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298414257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:34,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2023-11-22 21:16:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164698381] [2023-11-22 21:16:34,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:34,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 21:16:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 21:16:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-22 21:16:34,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 118 transitions, 1408 flow. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:35,733 INFO L124 PetriNetUnfolderBase]: 2379/4376 cut-off events. [2023-11-22 21:16:35,733 INFO L125 PetriNetUnfolderBase]: For 27729/27741 co-relation queries the response was YES. [2023-11-22 21:16:35,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20427 conditions, 4376 events. 2379/4376 cut-off events. For 27729/27741 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28660 event pairs, 340 based on Foata normal form. 186/4559 useless extension candidates. Maximal degree in co-relation 20372. Up to 680 conditions per place. [2023-11-22 21:16:35,762 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 181 selfloop transitions, 96 changer transitions 0/280 dead transitions. [2023-11-22 21:16:35,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 280 transitions, 3266 flow [2023-11-22 21:16:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 21:16:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 21:16:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 267 transitions. [2023-11-22 21:16:35,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2023-11-22 21:16:35,764 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 267 transitions. [2023-11-22 21:16:35,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 267 transitions. [2023-11-22 21:16:35,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:35,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 267 transitions. [2023-11-22 21:16:35,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.35) internal successors, (267), 20 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:35,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:35,766 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:35,766 INFO L175 Difference]: Start difference. First operand has 144 places, 118 transitions, 1408 flow. Second operand 20 states and 267 transitions. [2023-11-22 21:16:35,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 280 transitions, 3266 flow [2023-11-22 21:16:35,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 280 transitions, 2956 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-11-22 21:16:35,836 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 2066 flow [2023-11-22 21:16:35,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2066, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2023-11-22 21:16:35,837 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 117 predicate places. [2023-11-22 21:16:35,837 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 2066 flow [2023-11-22 21:16:35,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:35,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:35,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:35,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:36,040 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:36,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2108406359, now seen corresponding path program 7 times [2023-11-22 21:16:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265303032] [2023-11-22 21:16:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:36,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265303032] [2023-11-22 21:16:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265303032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401064329] [2023-11-22 21:16:36,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:16:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:36,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:36,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 21:16:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:36,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 21:16:36,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:36,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:36,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401064329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:36,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:36,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-22 21:16:36,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043956102] [2023-11-22 21:16:36,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 21:16:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 21:16:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-22 21:16:36,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:36,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 2066 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:36,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:36,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:36,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:37,201 INFO L124 PetriNetUnfolderBase]: 2313/4236 cut-off events. [2023-11-22 21:16:37,201 INFO L125 PetriNetUnfolderBase]: For 34196/34208 co-relation queries the response was YES. [2023-11-22 21:16:37,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21352 conditions, 4236 events. 2313/4236 cut-off events. For 34196/34208 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27749 event pairs, 592 based on Foata normal form. 70/4303 useless extension candidates. Maximal degree in co-relation 21279. Up to 1974 conditions per place. [2023-11-22 21:16:37,233 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 170 selfloop transitions, 36 changer transitions 0/209 dead transitions. [2023-11-22 21:16:37,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 209 transitions, 2962 flow [2023-11-22 21:16:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:16:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-22 21:16:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2023-11-22 21:16:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2023-11-22 21:16:37,234 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 122 transitions. [2023-11-22 21:16:37,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 122 transitions. [2023-11-22 21:16:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:37,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 122 transitions. [2023-11-22 21:16:37,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:37,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:37,235 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:37,235 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 2066 flow. Second operand 11 states and 122 transitions. [2023-11-22 21:16:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 209 transitions, 2962 flow [2023-11-22 21:16:37,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 209 transitions, 2775 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-11-22 21:16:37,359 INFO L231 Difference]: Finished difference. Result has 146 places, 152 transitions, 1880 flow [2023-11-22 21:16:37,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1880, PETRI_PLACES=146, PETRI_TRANSITIONS=152} [2023-11-22 21:16:37,359 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 119 predicate places. [2023-11-22 21:16:37,359 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 152 transitions, 1880 flow [2023-11-22 21:16:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:37,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:37,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:37,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:37,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:37,560 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:37,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash 790491788, now seen corresponding path program 1 times [2023-11-22 21:16:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:37,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730038470] [2023-11-22 21:16:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:37,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730038470] [2023-11-22 21:16:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730038470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255914196] [2023-11-22 21:16:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:37,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:37,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:37,979 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 21:16:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:38,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 21:16:38,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:38,200 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 21:16:38,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 21:16:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:38,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:38,300 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:38,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255914196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:38,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:38,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-11-22 21:16:38,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334840798] [2023-11-22 21:16:38,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:38,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:16:38,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:16:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:16:38,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:38,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 152 transitions, 1880 flow. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:38,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:38,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:38,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:39,197 INFO L124 PetriNetUnfolderBase]: 2374/4369 cut-off events. [2023-11-22 21:16:39,197 INFO L125 PetriNetUnfolderBase]: For 34520/34532 co-relation queries the response was YES. [2023-11-22 21:16:39,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22431 conditions, 4369 events. 2374/4369 cut-off events. For 34520/34532 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28639 event pairs, 836 based on Foata normal form. 20/4386 useless extension candidates. Maximal degree in co-relation 22358. Up to 3192 conditions per place. [2023-11-22 21:16:39,228 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 160 selfloop transitions, 52 changer transitions 38/253 dead transitions. [2023-11-22 21:16:39,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 3146 flow [2023-11-22 21:16:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 21:16:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 21:16:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 200 transitions. [2023-11-22 21:16:39,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2023-11-22 21:16:39,229 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 200 transitions. [2023-11-22 21:16:39,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 200 transitions. [2023-11-22 21:16:39,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:39,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 200 transitions. [2023-11-22 21:16:39,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 13.333333333333334) internal successors, (200), 15 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:39,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:39,232 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:39,232 INFO L175 Difference]: Start difference. First operand has 146 places, 152 transitions, 1880 flow. Second operand 15 states and 200 transitions. [2023-11-22 21:16:39,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 3146 flow [2023-11-22 21:16:39,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 253 transitions, 3110 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-22 21:16:39,308 INFO L231 Difference]: Finished difference. Result has 160 places, 160 transitions, 2087 flow [2023-11-22 21:16:39,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2087, PETRI_PLACES=160, PETRI_TRANSITIONS=160} [2023-11-22 21:16:39,308 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 133 predicate places. [2023-11-22 21:16:39,309 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 160 transitions, 2087 flow [2023-11-22 21:16:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:39,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:39,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:39,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:39,511 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:39,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1105121422, now seen corresponding path program 1 times [2023-11-22 21:16:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212919055] [2023-11-22 21:16:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:39,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:39,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212919055] [2023-11-22 21:16:39,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212919055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:39,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540724989] [2023-11-22 21:16:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:39,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:39,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:39,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 21:16:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:39,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 21:16:39,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:40,007 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 21:16:40,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 21:16:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:40,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:40,101 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:40,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:40,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540724989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:40,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:40,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-11-22 21:16:40,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027596479] [2023-11-22 21:16:40,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:40,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:16:40,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:40,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:16:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:16:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:40,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 160 transitions, 2087 flow. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:40,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:40,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:40,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:41,246 INFO L124 PetriNetUnfolderBase]: 2848/5253 cut-off events. [2023-11-22 21:16:41,246 INFO L125 PetriNetUnfolderBase]: For 54445/54457 co-relation queries the response was YES. [2023-11-22 21:16:41,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28822 conditions, 5253 events. 2848/5253 cut-off events. For 54445/54457 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 35586 event pairs, 815 based on Foata normal form. 112/5362 useless extension candidates. Maximal degree in co-relation 28743. Up to 3039 conditions per place. [2023-11-22 21:16:41,278 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 213 selfloop transitions, 82 changer transitions 2/300 dead transitions. [2023-11-22 21:16:41,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 4142 flow [2023-11-22 21:16:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 21:16:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 21:16:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 225 transitions. [2023-11-22 21:16:41,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849137931034483 [2023-11-22 21:16:41,279 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 225 transitions. [2023-11-22 21:16:41,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 225 transitions. [2023-11-22 21:16:41,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:41,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 225 transitions. [2023-11-22 21:16:41,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 14.0625) internal successors, (225), 16 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:41,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:41,281 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:41,281 INFO L175 Difference]: Start difference. First operand has 160 places, 160 transitions, 2087 flow. Second operand 16 states and 225 transitions. [2023-11-22 21:16:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 4142 flow [2023-11-22 21:16:41,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 300 transitions, 4010 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-11-22 21:16:41,370 INFO L231 Difference]: Finished difference. Result has 167 places, 184 transitions, 2587 flow [2023-11-22 21:16:41,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2587, PETRI_PLACES=167, PETRI_TRANSITIONS=184} [2023-11-22 21:16:41,371 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 140 predicate places. [2023-11-22 21:16:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 184 transitions, 2587 flow [2023-11-22 21:16:41,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:41,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:41,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:41,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:41,576 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:41,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash -144941822, now seen corresponding path program 2 times [2023-11-22 21:16:41,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:41,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519251486] [2023-11-22 21:16:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:41,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:41,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:41,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519251486] [2023-11-22 21:16:41,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519251486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:41,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972074932] [2023-11-22 21:16:41,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:16:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:41,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:41,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:41,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 21:16:41,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:41,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 21:16:41,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:42,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:42,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:16:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:42,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:42,230 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:42,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972074932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:42,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:42,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-22 21:16:42,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026162062] [2023-11-22 21:16:42,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:42,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 21:16:42,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 21:16:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-22 21:16:42,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:42,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 184 transitions, 2587 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:42,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:42,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:43,398 INFO L124 PetriNetUnfolderBase]: 3058/5627 cut-off events. [2023-11-22 21:16:43,398 INFO L125 PetriNetUnfolderBase]: For 58507/58507 co-relation queries the response was YES. [2023-11-22 21:16:43,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31858 conditions, 5627 events. 3058/5627 cut-off events. For 58507/58507 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 38626 event pairs, 1004 based on Foata normal form. 24/5649 useless extension candidates. Maximal degree in co-relation 31776. Up to 4196 conditions per place. [2023-11-22 21:16:43,439 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 203 selfloop transitions, 78 changer transitions 8/292 dead transitions. [2023-11-22 21:16:43,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 292 transitions, 4148 flow [2023-11-22 21:16:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 21:16:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 21:16:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 229 transitions. [2023-11-22 21:16:43,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645030425963489 [2023-11-22 21:16:43,442 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 229 transitions. [2023-11-22 21:16:43,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 229 transitions. [2023-11-22 21:16:43,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:43,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 229 transitions. [2023-11-22 21:16:43,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:43,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:43,444 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:43,444 INFO L175 Difference]: Start difference. First operand has 167 places, 184 transitions, 2587 flow. Second operand 17 states and 229 transitions. [2023-11-22 21:16:43,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 292 transitions, 4148 flow [2023-11-22 21:16:43,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 292 transitions, 4000 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-22 21:16:43,559 INFO L231 Difference]: Finished difference. Result has 180 places, 205 transitions, 3027 flow [2023-11-22 21:16:43,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3027, PETRI_PLACES=180, PETRI_TRANSITIONS=205} [2023-11-22 21:16:43,559 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 153 predicate places. [2023-11-22 21:16:43,559 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 205 transitions, 3027 flow [2023-11-22 21:16:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:43,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:43,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:43,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:43,761 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:43,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1195368334, now seen corresponding path program 2 times [2023-11-22 21:16:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:43,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489506774] [2023-11-22 21:16:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:43,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:44,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:44,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489506774] [2023-11-22 21:16:44,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489506774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:44,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271000723] [2023-11-22 21:16:44,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:16:44,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:44,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:44,073 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:44,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 21:16:44,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:16:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:44,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 21:16:44,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:44,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:44,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:16:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:44,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:44,472 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:44,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:44,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271000723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:44,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 21:16:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25717470] [2023-11-22 21:16:44,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:44,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:16:44,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:16:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:16:44,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:44,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 205 transitions, 3027 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:44,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:44,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:44,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:46,039 INFO L124 PetriNetUnfolderBase]: 3518/6493 cut-off events. [2023-11-22 21:16:46,039 INFO L125 PetriNetUnfolderBase]: For 85274/85274 co-relation queries the response was YES. [2023-11-22 21:16:46,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39081 conditions, 6493 events. 3518/6493 cut-off events. For 85274/85274 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 45878 event pairs, 1093 based on Foata normal form. 12/6503 useless extension candidates. Maximal degree in co-relation 38994. Up to 4485 conditions per place. [2023-11-22 21:16:46,098 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 227 selfloop transitions, 125 changer transitions 11/366 dead transitions. [2023-11-22 21:16:46,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 366 transitions, 5479 flow [2023-11-22 21:16:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 21:16:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-22 21:16:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 328 transitions. [2023-11-22 21:16:46,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2023-11-22 21:16:46,110 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 328 transitions. [2023-11-22 21:16:46,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 328 transitions. [2023-11-22 21:16:46,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:46,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 328 transitions. [2023-11-22 21:16:46,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 11.714285714285714) internal successors, (328), 28 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:46,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:46,112 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:46,112 INFO L175 Difference]: Start difference. First operand has 180 places, 205 transitions, 3027 flow. Second operand 28 states and 328 transitions. [2023-11-22 21:16:46,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 366 transitions, 5479 flow [2023-11-22 21:16:46,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 366 transitions, 5225 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-11-22 21:16:46,328 INFO L231 Difference]: Finished difference. Result has 205 places, 251 transitions, 4040 flow [2023-11-22 21:16:46,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4040, PETRI_PLACES=205, PETRI_TRANSITIONS=251} [2023-11-22 21:16:46,329 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2023-11-22 21:16:46,329 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 251 transitions, 4040 flow [2023-11-22 21:16:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:46,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:46,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:46,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-22 21:16:46,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:46,530 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:46,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1701746966, now seen corresponding path program 3 times [2023-11-22 21:16:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804961265] [2023-11-22 21:16:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804961265] [2023-11-22 21:16:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804961265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007806732] [2023-11-22 21:16:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:16:46,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:46,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:46,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 21:16:47,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:16:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:47,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-22 21:16:47,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:47,217 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 21:16:47,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 21:16:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:16:47,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:47,330 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:47,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:47,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007806732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:47,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:47,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 20 [2023-11-22 21:16:47,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215266499] [2023-11-22 21:16:47,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:47,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:16:47,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:16:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:16:47,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:47,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 251 transitions, 4040 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:47,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:47,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:47,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:48,882 INFO L124 PetriNetUnfolderBase]: 3500/6493 cut-off events. [2023-11-22 21:16:48,883 INFO L125 PetriNetUnfolderBase]: For 101105/101105 co-relation queries the response was YES. [2023-11-22 21:16:48,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41059 conditions, 6493 events. 3500/6493 cut-off events. For 101105/101105 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 46036 event pairs, 1202 based on Foata normal form. 18/6509 useless extension candidates. Maximal degree in co-relation 40962. Up to 5051 conditions per place. [2023-11-22 21:16:48,947 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 222 selfloop transitions, 87 changer transitions 21/333 dead transitions. [2023-11-22 21:16:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 333 transitions, 5318 flow [2023-11-22 21:16:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 21:16:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 21:16:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 228 transitions. [2023-11-22 21:16:48,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2023-11-22 21:16:48,950 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 228 transitions. [2023-11-22 21:16:48,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 228 transitions. [2023-11-22 21:16:48,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:48,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 228 transitions. [2023-11-22 21:16:48,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.666666666666666) internal successors, (228), 18 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:48,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:48,952 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:48,952 INFO L175 Difference]: Start difference. First operand has 205 places, 251 transitions, 4040 flow. Second operand 18 states and 228 transitions. [2023-11-22 21:16:48,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 333 transitions, 5318 flow [2023-11-22 21:16:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 333 transitions, 5050 flow, removed 93 selfloop flow, removed 15 redundant places. [2023-11-22 21:16:49,306 INFO L231 Difference]: Finished difference. Result has 205 places, 250 transitions, 3951 flow [2023-11-22 21:16:49,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3951, PETRI_PLACES=205, PETRI_TRANSITIONS=250} [2023-11-22 21:16:49,307 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2023-11-22 21:16:49,307 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 250 transitions, 3951 flow [2023-11-22 21:16:49,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:49,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:49,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:49,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 21:16:49,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-22 21:16:49,519 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:49,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2086874064, now seen corresponding path program 4 times [2023-11-22 21:16:49,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:49,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226929981] [2023-11-22 21:16:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:49,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226929981] [2023-11-22 21:16:49,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226929981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313106350] [2023-11-22 21:16:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:16:49,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:49,798 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:49,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 21:16:49,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:16:49,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:49,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 21:16:49,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:50,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:50,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 21:16:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:50,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:50,165 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:50,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313106350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:50,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-22 21:16:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825277525] [2023-11-22 21:16:50,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:16:50,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:16:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:16:50,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:50,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 250 transitions, 3951 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:50,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:50,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:50,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:51,555 INFO L124 PetriNetUnfolderBase]: 3390/6275 cut-off events. [2023-11-22 21:16:51,556 INFO L125 PetriNetUnfolderBase]: For 92369/92369 co-relation queries the response was YES. [2023-11-22 21:16:51,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39098 conditions, 6275 events. 3390/6275 cut-off events. For 92369/92369 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 44075 event pairs, 1156 based on Foata normal form. 18/6291 useless extension candidates. Maximal degree in co-relation 39003. Up to 4807 conditions per place. [2023-11-22 21:16:51,615 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 226 selfloop transitions, 90 changer transitions 14/333 dead transitions. [2023-11-22 21:16:51,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 333 transitions, 5281 flow [2023-11-22 21:16:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 21:16:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 21:16:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 234 transitions. [2023-11-22 21:16:51,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246823956442831 [2023-11-22 21:16:51,616 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 234 transitions. [2023-11-22 21:16:51,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 234 transitions. [2023-11-22 21:16:51,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:51,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 234 transitions. [2023-11-22 21:16:51,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.31578947368421) internal successors, (234), 19 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:51,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:51,617 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:51,618 INFO L175 Difference]: Start difference. First operand has 205 places, 250 transitions, 3951 flow. Second operand 19 states and 234 transitions. [2023-11-22 21:16:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 333 transitions, 5281 flow [2023-11-22 21:16:51,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 333 transitions, 5084 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-11-22 21:16:51,872 INFO L231 Difference]: Finished difference. Result has 207 places, 250 transitions, 3971 flow [2023-11-22 21:16:51,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3971, PETRI_PLACES=207, PETRI_TRANSITIONS=250} [2023-11-22 21:16:51,873 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 180 predicate places. [2023-11-22 21:16:51,873 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 250 transitions, 3971 flow [2023-11-22 21:16:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:51,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:51,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:51,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-22 21:16:52,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-22 21:16:52,075 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:52,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -487727038, now seen corresponding path program 3 times [2023-11-22 21:16:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:52,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86416746] [2023-11-22 21:16:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:52,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:52,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:52,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86416746] [2023-11-22 21:16:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86416746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524369221] [2023-11-22 21:16:52,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:16:52,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:52,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:52,365 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:52,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 21:16:52,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 21:16:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:52,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 21:16:52,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:52,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:52,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:16:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:16:52,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:52,756 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:52,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:52,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524369221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:52,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:52,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 21:16:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402626147] [2023-11-22 21:16:52,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:52,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:16:52,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:16:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:16:52,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:52,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 250 transitions, 3971 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:52,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:52,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:52,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:54,613 INFO L124 PetriNetUnfolderBase]: 3482/6428 cut-off events. [2023-11-22 21:16:54,613 INFO L125 PetriNetUnfolderBase]: For 105411/105411 co-relation queries the response was YES. [2023-11-22 21:16:54,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40641 conditions, 6428 events. 3482/6428 cut-off events. For 105411/105411 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45318 event pairs, 1048 based on Foata normal form. 80/6506 useless extension candidates. Maximal degree in co-relation 40546. Up to 4329 conditions per place. [2023-11-22 21:16:54,674 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 251 selfloop transitions, 134 changer transitions 12/400 dead transitions. [2023-11-22 21:16:54,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 400 transitions, 6033 flow [2023-11-22 21:16:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-22 21:16:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-22 21:16:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 392 transitions. [2023-11-22 21:16:54,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975659229208925 [2023-11-22 21:16:54,676 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 392 transitions. [2023-11-22 21:16:54,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 392 transitions. [2023-11-22 21:16:54,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:54,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 392 transitions. [2023-11-22 21:16:54,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 11.529411764705882) internal successors, (392), 34 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:54,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 29.0) internal successors, (1015), 35 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:54,678 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 29.0) internal successors, (1015), 35 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:54,678 INFO L175 Difference]: Start difference. First operand has 207 places, 250 transitions, 3971 flow. Second operand 34 states and 392 transitions. [2023-11-22 21:16:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 400 transitions, 6033 flow [2023-11-22 21:16:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 5781 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-11-22 21:16:55,018 INFO L231 Difference]: Finished difference. Result has 225 places, 263 transitions, 4255 flow [2023-11-22 21:16:55,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4255, PETRI_PLACES=225, PETRI_TRANSITIONS=263} [2023-11-22 21:16:55,019 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 198 predicate places. [2023-11-22 21:16:55,019 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 263 transitions, 4255 flow [2023-11-22 21:16:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:55,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:55,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:55,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-22 21:16:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-22 21:16:55,220 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:55,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash 946416602, now seen corresponding path program 4 times [2023-11-22 21:16:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927405248] [2023-11-22 21:16:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:55,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927405248] [2023-11-22 21:16:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927405248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058838485] [2023-11-22 21:16:55,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:16:55,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:55,473 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:55,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 21:16:55,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:16:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:55,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 21:16:55,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:55,690 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 21:16:55,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-22 21:16:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:55,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:55,779 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:16:55,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:16:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:55,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058838485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:55,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:55,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-22 21:16:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6312304] [2023-11-22 21:16:55,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:55,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 21:16:55,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 21:16:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-22 21:16:55,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:55,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 263 transitions, 4255 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:55,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:16:57,770 INFO L124 PetriNetUnfolderBase]: 3917/7182 cut-off events. [2023-11-22 21:16:57,770 INFO L125 PetriNetUnfolderBase]: For 159985/159985 co-relation queries the response was YES. [2023-11-22 21:16:57,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48476 conditions, 7182 events. 3917/7182 cut-off events. For 159985/159985 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 51414 event pairs, 936 based on Foata normal form. 174/7354 useless extension candidates. Maximal degree in co-relation 48375. Up to 4164 conditions per place. [2023-11-22 21:16:57,836 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 328 selfloop transitions, 187 changer transitions 15/533 dead transitions. [2023-11-22 21:16:57,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 533 transitions, 8286 flow [2023-11-22 21:16:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-22 21:16:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-22 21:16:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 514 transitions. [2023-11-22 21:16:57,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45446507515473034 [2023-11-22 21:16:57,837 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 514 transitions. [2023-11-22 21:16:57,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 514 transitions. [2023-11-22 21:16:57,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:16:57,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 514 transitions. [2023-11-22 21:16:57,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 13.179487179487179) internal successors, (514), 39 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:57,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 29.0) internal successors, (1160), 40 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:57,840 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 29.0) internal successors, (1160), 40 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:57,840 INFO L175 Difference]: Start difference. First operand has 225 places, 263 transitions, 4255 flow. Second operand 39 states and 514 transitions. [2023-11-22 21:16:57,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 533 transitions, 8286 flow [2023-11-22 21:16:58,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 533 transitions, 7851 flow, removed 37 selfloop flow, removed 27 redundant places. [2023-11-22 21:16:58,186 INFO L231 Difference]: Finished difference. Result has 245 places, 329 transitions, 5619 flow [2023-11-22 21:16:58,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5619, PETRI_PLACES=245, PETRI_TRANSITIONS=329} [2023-11-22 21:16:58,187 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 218 predicate places. [2023-11-22 21:16:58,187 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 329 transitions, 5619 flow [2023-11-22 21:16:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:58,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:16:58,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:16:58,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-22 21:16:58,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:58,388 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:16:58,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:16:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1340712200, now seen corresponding path program 5 times [2023-11-22 21:16:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:16:58,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282569149] [2023-11-22 21:16:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:16:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:16:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:16:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:58,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:16:58,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282569149] [2023-11-22 21:16:58,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282569149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:16:58,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550703566] [2023-11-22 21:16:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:16:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:16:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:16:58,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:16:58,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 21:16:58,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 21:16:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:16:58,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 21:16:58,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:16:58,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:16:58,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 21:16:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:58,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:16:58,877 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:16:58,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:16:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:16:58,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550703566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:16:58,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:16:58,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2023-11-22 21:16:58,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866768585] [2023-11-22 21:16:58,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:16:58,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 21:16:58,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:16:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 21:16:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-22 21:16:58,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:16:58,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 329 transitions, 5619 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:16:58,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:16:58,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:16:58,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:00,625 INFO L124 PetriNetUnfolderBase]: 4202/7719 cut-off events. [2023-11-22 21:17:00,625 INFO L125 PetriNetUnfolderBase]: For 216199/216211 co-relation queries the response was YES. [2023-11-22 21:17:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55139 conditions, 7719 events. 4202/7719 cut-off events. For 216199/216211 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 56463 event pairs, 1187 based on Foata normal form. 44/7760 useless extension candidates. Maximal degree in co-relation 55028. Up to 5719 conditions per place. [2023-11-22 21:17:00,724 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 333 selfloop transitions, 125 changer transitions 6/467 dead transitions. [2023-11-22 21:17:00,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 467 transitions, 8108 flow [2023-11-22 21:17:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 21:17:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 21:17:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 269 transitions. [2023-11-22 21:17:00,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46379310344827585 [2023-11-22 21:17:00,725 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 269 transitions. [2023-11-22 21:17:00,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 269 transitions. [2023-11-22 21:17:00,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:00,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 269 transitions. [2023-11-22 21:17:00,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.45) internal successors, (269), 20 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:00,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:00,727 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:00,727 INFO L175 Difference]: Start difference. First operand has 245 places, 329 transitions, 5619 flow. Second operand 20 states and 269 transitions. [2023-11-22 21:17:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 467 transitions, 8108 flow [2023-11-22 21:17:01,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 467 transitions, 7592 flow, removed 164 selfloop flow, removed 16 redundant places. [2023-11-22 21:17:01,495 INFO L231 Difference]: Finished difference. Result has 256 places, 371 transitions, 6414 flow [2023-11-22 21:17:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6414, PETRI_PLACES=256, PETRI_TRANSITIONS=371} [2023-11-22 21:17:01,497 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 229 predicate places. [2023-11-22 21:17:01,497 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 371 transitions, 6414 flow [2023-11-22 21:17:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:01,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:01,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-22 21:17:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-22 21:17:01,708 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1908014788, now seen corresponding path program 5 times [2023-11-22 21:17:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518992326] [2023-11-22 21:17:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:01,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518992326] [2023-11-22 21:17:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518992326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654152799] [2023-11-22 21:17:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:17:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:01,964 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:02,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 21:17:02,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 21:17:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:02,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 21:17:02,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:02,174 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 21:17:02,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 21:17:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:02,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:02,258 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:02,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:02,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654152799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:02,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:02,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 21:17:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060386813] [2023-11-22 21:17:02,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:02,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 21:17:02,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 21:17:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 21:17:02,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:02,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 371 transitions, 6414 flow. Second operand has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:02,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:02,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:03,908 INFO L124 PetriNetUnfolderBase]: 4204/7731 cut-off events. [2023-11-22 21:17:03,908 INFO L125 PetriNetUnfolderBase]: For 203480/203492 co-relation queries the response was YES. [2023-11-22 21:17:03,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54977 conditions, 7731 events. 4204/7731 cut-off events. For 203480/203492 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 56650 event pairs, 1292 based on Foata normal form. 16/7744 useless extension candidates. Maximal degree in co-relation 54860. Up to 6342 conditions per place. [2023-11-22 21:17:04,154 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 319 selfloop transitions, 95 changer transitions 24/441 dead transitions. [2023-11-22 21:17:04,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 441 transitions, 7799 flow [2023-11-22 21:17:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 21:17:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 21:17:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 199 transitions. [2023-11-22 21:17:04,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574712643678161 [2023-11-22 21:17:04,157 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 199 transitions. [2023-11-22 21:17:04,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 199 transitions. [2023-11-22 21:17:04,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:04,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 199 transitions. [2023-11-22 21:17:04,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 13.266666666666667) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:04,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:04,159 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:04,159 INFO L175 Difference]: Start difference. First operand has 256 places, 371 transitions, 6414 flow. Second operand 15 states and 199 transitions. [2023-11-22 21:17:04,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 441 transitions, 7799 flow [2023-11-22 21:17:05,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 441 transitions, 7319 flow, removed 180 selfloop flow, removed 10 redundant places. [2023-11-22 21:17:05,262 INFO L231 Difference]: Finished difference. Result has 263 places, 372 transitions, 6171 flow [2023-11-22 21:17:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6171, PETRI_PLACES=263, PETRI_TRANSITIONS=372} [2023-11-22 21:17:05,262 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 236 predicate places. [2023-11-22 21:17:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 372 transitions, 6171 flow [2023-11-22 21:17:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:05,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-22 21:17:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-22 21:17:05,463 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:05,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -667850642, now seen corresponding path program 6 times [2023-11-22 21:17:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638960521] [2023-11-22 21:17:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:05,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638960521] [2023-11-22 21:17:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638960521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508453779] [2023-11-22 21:17:05,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:17:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:05,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:05,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 21:17:05,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-22 21:17:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:05,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 21:17:05,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:05,928 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:17:05,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 21:17:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:05,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:05,995 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:05,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508453779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:06,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:06,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-11-22 21:17:06,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143538438] [2023-11-22 21:17:06,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:06,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:17:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:17:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:17:06,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:06,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 372 transitions, 6171 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:06,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:06,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:08,044 INFO L124 PetriNetUnfolderBase]: 4356/8016 cut-off events. [2023-11-22 21:17:08,044 INFO L125 PetriNetUnfolderBase]: For 144725/144737 co-relation queries the response was YES. [2023-11-22 21:17:08,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52909 conditions, 8016 events. 4356/8016 cut-off events. For 144725/144737 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 59252 event pairs, 1110 based on Foata normal form. 44/8057 useless extension candidates. Maximal degree in co-relation 52791. Up to 5535 conditions per place. [2023-11-22 21:17:08,119 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 336 selfloop transitions, 132 changer transitions 4/475 dead transitions. [2023-11-22 21:17:08,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 475 transitions, 8171 flow [2023-11-22 21:17:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 21:17:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 21:17:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 224 transitions. [2023-11-22 21:17:08,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-22 21:17:08,120 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 224 transitions. [2023-11-22 21:17:08,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 224 transitions. [2023-11-22 21:17:08,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:08,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 224 transitions. [2023-11-22 21:17:08,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 14.0) internal successors, (224), 16 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:08,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:08,121 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:08,121 INFO L175 Difference]: Start difference. First operand has 263 places, 372 transitions, 6171 flow. Second operand 16 states and 224 transitions. [2023-11-22 21:17:08,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 475 transitions, 8171 flow [2023-11-22 21:17:08,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 475 transitions, 7949 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-11-22 21:17:08,733 INFO L231 Difference]: Finished difference. Result has 267 places, 377 transitions, 6400 flow [2023-11-22 21:17:08,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6400, PETRI_PLACES=267, PETRI_TRANSITIONS=377} [2023-11-22 21:17:08,734 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 240 predicate places. [2023-11-22 21:17:08,734 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 377 transitions, 6400 flow [2023-11-22 21:17:08,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:08,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:08,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:08,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 21:17:08,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-22 21:17:08,936 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:08,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash -844070386, now seen corresponding path program 6 times [2023-11-22 21:17:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33410608] [2023-11-22 21:17:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33410608] [2023-11-22 21:17:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33410608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596328393] [2023-11-22 21:17:09,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:17:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:09,166 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:09,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 21:17:09,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-22 21:17:09,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:09,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-22 21:17:09,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:09,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:17:09,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:17:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:17:09,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:09,592 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:09,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:09,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596328393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:09,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:09,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 6] total 21 [2023-11-22 21:17:09,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929424292] [2023-11-22 21:17:09,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:09,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:17:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:17:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-22 21:17:09,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:09,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 377 transitions, 6400 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:09,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:09,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:09,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:11,653 INFO L124 PetriNetUnfolderBase]: 4276/7936 cut-off events. [2023-11-22 21:17:11,653 INFO L125 PetriNetUnfolderBase]: For 153647/153659 co-relation queries the response was YES. [2023-11-22 21:17:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52999 conditions, 7936 events. 4276/7936 cut-off events. For 153647/153659 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 59038 event pairs, 1220 based on Foata normal form. 88/8021 useless extension candidates. Maximal degree in co-relation 52879. Up to 6353 conditions per place. [2023-11-22 21:17:11,733 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 341 selfloop transitions, 110 changer transitions 16/470 dead transitions. [2023-11-22 21:17:11,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 470 transitions, 8051 flow [2023-11-22 21:17:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 21:17:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 21:17:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 260 transitions. [2023-11-22 21:17:11,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-11-22 21:17:11,734 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 260 transitions. [2023-11-22 21:17:11,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 260 transitions. [2023-11-22 21:17:11,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:11,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 260 transitions. [2023-11-22 21:17:11,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.0) internal successors, (260), 20 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:11,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:11,736 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:11,736 INFO L175 Difference]: Start difference. First operand has 267 places, 377 transitions, 6400 flow. Second operand 20 states and 260 transitions. [2023-11-22 21:17:11,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 470 transitions, 8051 flow [2023-11-22 21:17:12,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 470 transitions, 7830 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-11-22 21:17:12,399 INFO L231 Difference]: Finished difference. Result has 277 places, 379 transitions, 6482 flow [2023-11-22 21:17:12,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6201, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6482, PETRI_PLACES=277, PETRI_TRANSITIONS=379} [2023-11-22 21:17:12,400 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 250 predicate places. [2023-11-22 21:17:12,400 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 379 transitions, 6482 flow [2023-11-22 21:17:12,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:12,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:12,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:12,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-22 21:17:12,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:12,611 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:12,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1712096690, now seen corresponding path program 7 times [2023-11-22 21:17:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:12,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447768838] [2023-11-22 21:17:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:12,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447768838] [2023-11-22 21:17:12,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447768838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:12,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097312453] [2023-11-22 21:17:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:17:12,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:12,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:12,809 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:12,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 21:17:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:12,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 21:17:12,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:13,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:17:13,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 21:17:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:13,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:13,079 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:13,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097312453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:13,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 21:17:13,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114281023] [2023-11-22 21:17:13,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:13,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 21:17:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 21:17:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-22 21:17:13,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:13,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 379 transitions, 6482 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:13,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:13,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:13,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:15,057 INFO L124 PetriNetUnfolderBase]: 4132/7628 cut-off events. [2023-11-22 21:17:15,057 INFO L125 PetriNetUnfolderBase]: For 146427/146439 co-relation queries the response was YES. [2023-11-22 21:17:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51890 conditions, 7628 events. 4132/7628 cut-off events. For 146427/146439 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 55901 event pairs, 1162 based on Foata normal form. 20/7645 useless extension candidates. Maximal degree in co-relation 51768. Up to 6180 conditions per place. [2023-11-22 21:17:15,157 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 309 selfloop transitions, 122 changer transitions 14/448 dead transitions. [2023-11-22 21:17:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 448 transitions, 7782 flow [2023-11-22 21:17:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 21:17:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 21:17:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2023-11-22 21:17:15,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426497277676951 [2023-11-22 21:17:15,160 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 235 transitions. [2023-11-22 21:17:15,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 235 transitions. [2023-11-22 21:17:15,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:15,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 235 transitions. [2023-11-22 21:17:15,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:15,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:15,164 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:15,164 INFO L175 Difference]: Start difference. First operand has 277 places, 379 transitions, 6482 flow. Second operand 19 states and 235 transitions. [2023-11-22 21:17:15,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 448 transitions, 7782 flow [2023-11-22 21:17:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 448 transitions, 7630 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-11-22 21:17:15,861 INFO L231 Difference]: Finished difference. Result has 282 places, 375 transitions, 6512 flow [2023-11-22 21:17:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6512, PETRI_PLACES=282, PETRI_TRANSITIONS=375} [2023-11-22 21:17:15,862 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 255 predicate places. [2023-11-22 21:17:15,862 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 375 transitions, 6512 flow [2023-11-22 21:17:15,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:15,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-22 21:17:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:16,063 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:16,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -867913710, now seen corresponding path program 7 times [2023-11-22 21:17:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744159055] [2023-11-22 21:17:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:16,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744159055] [2023-11-22 21:17:16,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744159055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:16,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367939349] [2023-11-22 21:17:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:17:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:16,283 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 21:17:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:16,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 21:17:16,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:16,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:17:16,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 21:17:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:16,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:16,597 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:16,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367939349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:16,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:16,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 21:17:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557703132] [2023-11-22 21:17:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 21:17:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 21:17:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 21:17:16,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:16,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 375 transitions, 6512 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:16,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:16,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:16,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:18,597 INFO L124 PetriNetUnfolderBase]: 3964/7245 cut-off events. [2023-11-22 21:17:18,597 INFO L125 PetriNetUnfolderBase]: For 144927/144939 co-relation queries the response was YES. [2023-11-22 21:17:18,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50274 conditions, 7245 events. 3964/7245 cut-off events. For 144927/144939 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 52001 event pairs, 1112 based on Foata normal form. 16/7258 useless extension candidates. Maximal degree in co-relation 50153. Up to 6113 conditions per place. [2023-11-22 21:17:18,673 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 336 selfloop transitions, 104 changer transitions 22/465 dead transitions. [2023-11-22 21:17:18,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 465 transitions, 8036 flow [2023-11-22 21:17:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 21:17:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-22 21:17:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 270 transitions. [2023-11-22 21:17:18,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4047976011994003 [2023-11-22 21:17:18,675 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 270 transitions. [2023-11-22 21:17:18,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 270 transitions. [2023-11-22 21:17:18,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:18,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 270 transitions. [2023-11-22 21:17:18,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.73913043478261) internal successors, (270), 23 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:18,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:18,676 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:18,676 INFO L175 Difference]: Start difference. First operand has 282 places, 375 transitions, 6512 flow. Second operand 23 states and 270 transitions. [2023-11-22 21:17:18,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 465 transitions, 8036 flow [2023-11-22 21:17:19,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 465 transitions, 7735 flow, removed 3 selfloop flow, removed 19 redundant places. [2023-11-22 21:17:19,310 INFO L231 Difference]: Finished difference. Result has 284 places, 375 transitions, 6478 flow [2023-11-22 21:17:19,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6157, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6478, PETRI_PLACES=284, PETRI_TRANSITIONS=375} [2023-11-22 21:17:19,311 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 257 predicate places. [2023-11-22 21:17:19,311 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 375 transitions, 6478 flow [2023-11-22 21:17:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:19,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:19,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-22 21:17:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:19,513 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:19,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -611579136, now seen corresponding path program 8 times [2023-11-22 21:17:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:19,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609909813] [2023-11-22 21:17:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609909813] [2023-11-22 21:17:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609909813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737834794] [2023-11-22 21:17:19,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:17:19,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:19,940 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 21:17:20,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:17:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:20,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 21:17:20,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:20,274 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 21:17:20,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 21:17:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:20,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:20,355 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:17:20,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:17:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737834794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:20,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-22 21:17:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466300264] [2023-11-22 21:17:20,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:17:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:17:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:17:20,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:20,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 375 transitions, 6478 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:20,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:20,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:20,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:22,508 INFO L124 PetriNetUnfolderBase]: 4326/7920 cut-off events. [2023-11-22 21:17:22,509 INFO L125 PetriNetUnfolderBase]: For 165285/165297 co-relation queries the response was YES. [2023-11-22 21:17:22,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54888 conditions, 7920 events. 4326/7920 cut-off events. For 165285/165297 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 57641 event pairs, 1303 based on Foata normal form. 32/7949 useless extension candidates. Maximal degree in co-relation 54766. Up to 5874 conditions per place. [2023-11-22 21:17:22,588 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 445 selfloop transitions, 61 changer transitions 1/510 dead transitions. [2023-11-22 21:17:22,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 510 transitions, 9290 flow [2023-11-22 21:17:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 21:17:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 21:17:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2023-11-22 21:17:22,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676724137931034 [2023-11-22 21:17:22,589 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 217 transitions. [2023-11-22 21:17:22,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 217 transitions. [2023-11-22 21:17:22,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:22,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 217 transitions. [2023-11-22 21:17:22,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:22,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:22,591 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:22,591 INFO L175 Difference]: Start difference. First operand has 284 places, 375 transitions, 6478 flow. Second operand 16 states and 217 transitions. [2023-11-22 21:17:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 510 transitions, 9290 flow [2023-11-22 21:17:23,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 510 transitions, 9044 flow, removed 20 selfloop flow, removed 17 redundant places. [2023-11-22 21:17:23,194 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 6755 flow [2023-11-22 21:17:23,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6755, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2023-11-22 21:17:23,194 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 256 predicate places. [2023-11-22 21:17:23,194 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 6755 flow [2023-11-22 21:17:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:23,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:23,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:23,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 21:17:23,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-22 21:17:23,400 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:23,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:23,401 INFO L85 PathProgramCache]: Analyzing trace with hash 352447020, now seen corresponding path program 8 times [2023-11-22 21:17:23,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:23,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5760915] [2023-11-22 21:17:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:23,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5760915] [2023-11-22 21:17:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5760915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602005448] [2023-11-22 21:17:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:17:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:23,701 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 21:17:23,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:17:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:23,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 21:17:23,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:24,064 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 21:17:24,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 21:17:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:17:24,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:24,152 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:17:24,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:17:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:24,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602005448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:24,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:24,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 21 [2023-11-22 21:17:24,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087473046] [2023-11-22 21:17:24,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:24,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:17:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:17:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-22 21:17:24,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:24,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 6755 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:24,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:24,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:24,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:26,250 INFO L124 PetriNetUnfolderBase]: 4364/8013 cut-off events. [2023-11-22 21:17:26,251 INFO L125 PetriNetUnfolderBase]: For 186376/186388 co-relation queries the response was YES. [2023-11-22 21:17:26,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56955 conditions, 8013 events. 4364/8013 cut-off events. For 186376/186388 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 58665 event pairs, 1497 based on Foata normal form. 16/8026 useless extension candidates. Maximal degree in co-relation 56825. Up to 6892 conditions per place. [2023-11-22 21:17:26,337 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 391 selfloop transitions, 45 changer transitions 34/473 dead transitions. [2023-11-22 21:17:26,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 473 transitions, 8586 flow [2023-11-22 21:17:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 21:17:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 21:17:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2023-11-22 21:17:26,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 21:17:26,352 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 196 transitions. [2023-11-22 21:17:26,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 196 transitions. [2023-11-22 21:17:26,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:26,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 196 transitions. [2023-11-22 21:17:26,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.25) internal successors, (196), 16 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:26,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:26,354 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:26,354 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 6755 flow. Second operand 16 states and 196 transitions. [2023-11-22 21:17:26,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 473 transitions, 8586 flow [2023-11-22 21:17:27,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 473 transitions, 8328 flow, removed 62 selfloop flow, removed 8 redundant places. [2023-11-22 21:17:27,210 INFO L231 Difference]: Finished difference. Result has 294 places, 386 transitions, 6512 flow [2023-11-22 21:17:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6512, PETRI_PLACES=294, PETRI_TRANSITIONS=386} [2023-11-22 21:17:27,211 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 267 predicate places. [2023-11-22 21:17:27,211 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 386 transitions, 6512 flow [2023-11-22 21:17:27,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:27,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:27,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:27,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-22 21:17:27,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:27,416 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:27,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash -799486148, now seen corresponding path program 9 times [2023-11-22 21:17:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:27,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772084539] [2023-11-22 21:17:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772084539] [2023-11-22 21:17:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772084539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865945824] [2023-11-22 21:17:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:17:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:27,645 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:27,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 21:17:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:17:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:27,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 21:17:27,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:27,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:17:27,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 21:17:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:17:27,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:28,022 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:17:28,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:17:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865945824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:28,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 18 [2023-11-22 21:17:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350470927] [2023-11-22 21:17:28,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:17:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:17:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:17:28,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:28,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 386 transitions, 6512 flow. Second operand has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:28,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:28,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:28,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:30,172 INFO L124 PetriNetUnfolderBase]: 4442/8146 cut-off events. [2023-11-22 21:17:30,172 INFO L125 PetriNetUnfolderBase]: For 202065/202077 co-relation queries the response was YES. [2023-11-22 21:17:30,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 8146 events. 4442/8146 cut-off events. For 202065/202077 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 59802 event pairs, 1447 based on Foata normal form. 40/8183 useless extension candidates. Maximal degree in co-relation 57772. Up to 6883 conditions per place. [2023-11-22 21:17:30,253 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 404 selfloop transitions, 76 changer transitions 2/485 dead transitions. [2023-11-22 21:17:30,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 485 transitions, 8812 flow [2023-11-22 21:17:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 21:17:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 21:17:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 212 transitions. [2023-11-22 21:17:30,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300202839756592 [2023-11-22 21:17:30,254 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 212 transitions. [2023-11-22 21:17:30,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 212 transitions. [2023-11-22 21:17:30,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:30,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 212 transitions. [2023-11-22 21:17:30,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.470588235294118) internal successors, (212), 17 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:30,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:30,255 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:30,255 INFO L175 Difference]: Start difference. First operand has 294 places, 386 transitions, 6512 flow. Second operand 17 states and 212 transitions. [2023-11-22 21:17:30,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 485 transitions, 8812 flow [2023-11-22 21:17:31,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 485 transitions, 8636 flow, removed 30 selfloop flow, removed 14 redundant places. [2023-11-22 21:17:31,043 INFO L231 Difference]: Finished difference. Result has 297 places, 409 transitions, 7101 flow [2023-11-22 21:17:31,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6402, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7101, PETRI_PLACES=297, PETRI_TRANSITIONS=409} [2023-11-22 21:17:31,044 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 270 predicate places. [2023-11-22 21:17:31,044 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 409 transitions, 7101 flow [2023-11-22 21:17:31,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:31,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:31,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:31,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-22 21:17:31,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:31,248 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:31,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1474766352, now seen corresponding path program 10 times [2023-11-22 21:17:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:31,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991223438] [2023-11-22 21:17:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:31,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991223438] [2023-11-22 21:17:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991223438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437695818] [2023-11-22 21:17:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:17:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:31,456 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 21:17:31,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:17:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:31,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 21:17:31,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:31,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:17:31,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 21:17:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:31,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:31,844 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 21:17:31,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 21:17:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 21:17:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437695818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:31,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:31,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2023-11-22 21:17:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465693644] [2023-11-22 21:17:31,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 21:17:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 21:17:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-22 21:17:31,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:31,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 409 transitions, 7101 flow. Second operand has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:31,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:31,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:31,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:34,398 INFO L124 PetriNetUnfolderBase]: 4788/8838 cut-off events. [2023-11-22 21:17:34,398 INFO L125 PetriNetUnfolderBase]: For 246472/246472 co-relation queries the response was YES. [2023-11-22 21:17:34,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63712 conditions, 8838 events. 4788/8838 cut-off events. For 246472/246472 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 66414 event pairs, 1641 based on Foata normal form. 48/8884 useless extension candidates. Maximal degree in co-relation 63578. Up to 7147 conditions per place. [2023-11-22 21:17:34,494 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 436 selfloop transitions, 102 changer transitions 3/544 dead transitions. [2023-11-22 21:17:34,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 544 transitions, 10057 flow [2023-11-22 21:17:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 21:17:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 21:17:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 261 transitions. [2023-11-22 21:17:34,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-22 21:17:34,495 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 261 transitions. [2023-11-22 21:17:34,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 261 transitions. [2023-11-22 21:17:34,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:34,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 261 transitions. [2023-11-22 21:17:34,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.05) internal successors, (261), 20 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:34,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:34,496 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:34,497 INFO L175 Difference]: Start difference. First operand has 297 places, 409 transitions, 7101 flow. Second operand 20 states and 261 transitions. [2023-11-22 21:17:34,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 544 transitions, 10057 flow [2023-11-22 21:17:35,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 544 transitions, 9680 flow, removed 139 selfloop flow, removed 10 redundant places. [2023-11-22 21:17:35,544 INFO L231 Difference]: Finished difference. Result has 314 places, 451 transitions, 8099 flow [2023-11-22 21:17:35,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8099, PETRI_PLACES=314, PETRI_TRANSITIONS=451} [2023-11-22 21:17:35,545 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 287 predicate places. [2023-11-22 21:17:35,545 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 451 transitions, 8099 flow [2023-11-22 21:17:35,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:35,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:35,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:35,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-22 21:17:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-22 21:17:35,756 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:35,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash -325166154, now seen corresponding path program 9 times [2023-11-22 21:17:35,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:35,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512993226] [2023-11-22 21:17:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:35,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512993226] [2023-11-22 21:17:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512993226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924371563] [2023-11-22 21:17:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:17:36,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:36,012 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:36,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 21:17:36,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 21:17:36,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:36,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-22 21:17:36,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:36,415 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-11-22 21:17:36,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 45 [2023-11-22 21:17:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:17:36,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:36,706 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:17:36,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:17:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:17:36,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924371563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:36,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:36,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 10] total 29 [2023-11-22 21:17:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860212419] [2023-11-22 21:17:36,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 21:17:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 21:17:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2023-11-22 21:17:36,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:36,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 451 transitions, 8099 flow. Second operand has 30 states, 30 states have (on average 7.3) internal successors, (219), 30 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:36,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:36,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:36,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:17:45,191 INFO L124 PetriNetUnfolderBase]: 12741/23777 cut-off events. [2023-11-22 21:17:45,191 INFO L125 PetriNetUnfolderBase]: For 700144/700144 co-relation queries the response was YES. [2023-11-22 21:17:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172420 conditions, 23777 events. 12741/23777 cut-off events. For 700144/700144 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 211333 event pairs, 1450 based on Foata normal form. 64/23840 useless extension candidates. Maximal degree in co-relation 170584. Up to 4458 conditions per place. [2023-11-22 21:17:45,557 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 637 selfloop transitions, 1159 changer transitions 35/1834 dead transitions. [2023-11-22 21:17:45,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1834 transitions, 34597 flow [2023-11-22 21:17:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-22 21:17:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-11-22 21:17:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 972 transitions. [2023-11-22 21:17:45,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189655172413793 [2023-11-22 21:17:45,559 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 972 transitions. [2023-11-22 21:17:45,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 972 transitions. [2023-11-22 21:17:45,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:17:45,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 972 transitions. [2023-11-22 21:17:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 12.15) internal successors, (972), 80 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:45,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 29.0) internal successors, (2349), 81 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:45,562 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 29.0) internal successors, (2349), 81 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:45,562 INFO L175 Difference]: Start difference. First operand has 314 places, 451 transitions, 8099 flow. Second operand 80 states and 972 transitions. [2023-11-22 21:17:45,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1834 transitions, 34597 flow [2023-11-22 21:17:50,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1834 transitions, 32653 flow, removed 887 selfloop flow, removed 9 redundant places. [2023-11-22 21:17:50,534 INFO L231 Difference]: Finished difference. Result has 420 places, 1368 transitions, 28940 flow [2023-11-22 21:17:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7578, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=28940, PETRI_PLACES=420, PETRI_TRANSITIONS=1368} [2023-11-22 21:17:50,535 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 393 predicate places. [2023-11-22 21:17:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1368 transitions, 28940 flow [2023-11-22 21:17:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.3) internal successors, (219), 30 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:17:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:17:50,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-22 21:17:50,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-22 21:17:50,736 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:17:50,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:17:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 843555536, now seen corresponding path program 10 times [2023-11-22 21:17:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:17:50,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915047007] [2023-11-22 21:17:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:17:50,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:17:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:17:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:51,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:17:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915047007] [2023-11-22 21:17:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915047007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:17:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652839667] [2023-11-22 21:17:51,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:17:51,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:17:51,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:17:51,014 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:17:51,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 21:17:51,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:17:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:17:51,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 21:17:51,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:17:51,301 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 21:17:51,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-22 21:17:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:17:51,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:17:51,392 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:17:51,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:17:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:17:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652839667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:17:51,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:17:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-22 21:17:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428587287] [2023-11-22 21:17:51,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:17:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:17:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:17:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:17:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:17:51,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:17:51,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1368 transitions, 28940 flow. Second operand has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:17:51,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:17:51,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:17:51,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:18:02,571 INFO L124 PetriNetUnfolderBase]: 13505/25128 cut-off events. [2023-11-22 21:18:02,571 INFO L125 PetriNetUnfolderBase]: For 954660/954660 co-relation queries the response was YES. [2023-11-22 21:18:02,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205860 conditions, 25128 events. 13505/25128 cut-off events. For 954660/954660 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 224430 event pairs, 3814 based on Foata normal form. 216/25340 useless extension candidates. Maximal degree in co-relation 204973. Up to 18315 conditions per place. [2023-11-22 21:18:03,087 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1304 selfloop transitions, 376 changer transitions 17/1700 dead transitions. [2023-11-22 21:18:03,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1700 transitions, 38632 flow [2023-11-22 21:18:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-22 21:18:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-22 21:18:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 443 transitions. [2023-11-22 21:18:03,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42432950191570884 [2023-11-22 21:18:03,089 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 443 transitions. [2023-11-22 21:18:03,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 443 transitions. [2023-11-22 21:18:03,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:18:03,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 443 transitions. [2023-11-22 21:18:03,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 12.305555555555555) internal successors, (443), 36 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:18:03,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 29.0) internal successors, (1073), 37 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:18:03,091 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 29.0) internal successors, (1073), 37 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:18:03,091 INFO L175 Difference]: Start difference. First operand has 420 places, 1368 transitions, 28940 flow. Second operand 36 states and 443 transitions. [2023-11-22 21:18:03,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1700 transitions, 38632 flow [2023-11-22 21:18:13,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1700 transitions, 35531 flow, removed 1511 selfloop flow, removed 8 redundant places. [2023-11-22 21:18:13,855 INFO L231 Difference]: Finished difference. Result has 455 places, 1488 transitions, 30088 flow [2023-11-22 21:18:13,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26307, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=30088, PETRI_PLACES=455, PETRI_TRANSITIONS=1488} [2023-11-22 21:18:13,857 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 428 predicate places. [2023-11-22 21:18:13,857 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 1488 transitions, 30088 flow [2023-11-22 21:18:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:18:13,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:18:13,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:18:13,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-22 21:18:14,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-22 21:18:14,064 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:18:14,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:18:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1311060168, now seen corresponding path program 11 times [2023-11-22 21:18:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:18:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000226487] [2023-11-22 21:18:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:18:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:18:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:18:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:18:14,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:18:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000226487] [2023-11-22 21:18:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000226487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:18:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281275123] [2023-11-22 21:18:14,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:18:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:18:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:18:14,292 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:18:14,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 21:18:14,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 21:18:14,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:18:14,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 21:18:14,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:18:14,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:18:14,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 21:18:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:18:14,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:18:14,654 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 21:18:14,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 21:18:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:18:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281275123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:18:14,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:18:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-22 21:18:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269809150] [2023-11-22 21:18:14,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:18:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:18:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:18:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:18:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:18:14,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 21:18:14,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1488 transitions, 30088 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:18:14,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:18:14,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 21:18:14,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand